Become a TFP Supporter Pool Math Forum Rules Pool School
Page 1 of 2 12 LastLast
Results 1 to 20 of 24

Thread: SLAM status log

  1. Back To Top    #1

    Join Date
    Apr 2016
    Location
    College Station, TX
    Posts
    79

    SLAM status log

    I'm starting a SLAM today. Water continues to be cloudy and chlorine usage has started creeping up. The last couple of days, to prepare:
    Ordered an extra XL from tftestkits.net (and a speedstir for fun)
    Good vacuuming of the pool floor
    Good long backwash of the sand filter. Start up psi is 8psi.
    Wife brought home a bunch of 10% with 16176 date stamps.


    Hooked up the 'Lady Bug vacuum' and let it run. Set pump on full time.

    Topped of the pool water level

    Tested at 0830 this morning:
    FC 3.5 (dropped from 8ppm at 0830 yesterday with no swimming but a lot of sun)
    CC 0
    pH 7.6
    TA 60 (YEAH! Finally got it down)
    CYA 39 (That's what I'm calling it. It was just below the 40 mark)
    CH - don't care
    Borates- about 11 ppm calculated, not tested

    To start:
    At 1030 I added
    26 fl oz MA to get between 7.1-7.2 pH
    272 fl oz 10% for a target 15 ppm FC

    I'm initially going to test every 30 mins and maintain. I'll keep you updated! And I'll get an almost 'before' pic at the next test too.
    Intex 16'x32'x54" 17Kgal AGP since 2014. Sand filter, Hayward skimmer, home built 10'x15' deck and stairs, solar heater. High TA tap water, moderate rainfall, weekly use. Treated with 10% bleach, MA and some dichlor initially. Soon to add borates.
    Taylor K2006C
    Future projects - automatic chlorine pump, online pool sensors, better heater, IGP (maybe)

  2. Back To Top    #2
    Texas Splash's Avatar
    Join Date
    Jun 2014
    Location
    South-Central Texas, Marion/San Antonio
    Posts
    12,928

    Re: SLAM status log

    Sounds like you're off & running in the right direction. Suggestion - the FC/CYA ratio was developed as such that we round-up the CYA (i.e. to 40) so that your FC on the chart would equate to 16. No need to break it down incrementally. Stick with the SLAM page and let us know if you have any questions or problems. Have a nice day. It's going to be a scorcher.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
    If you enjoyed your TFP experience, please consider donating to Support TFP!

  3. Back To Top    #3
    mepcards's Avatar
    Join Date
    Sep 2015
    Location
    mesquite,tx
    Posts
    240

    Re: SLAM status log

    That is a very familiar sight..lol...I went through 20 jugs during my slam..
    24x16 doughboy Summerville..22" Waterway "sand" 1.5 HP 2sp motor..Misty Falls liner, and wedding cake stairs..

  4. Back To Top    #4

    Join Date
    Apr 2016
    Location
    College Station, TX
    Posts
    79

    Re: SLAM status log

    Didn't quite make my 30 minute goal. Work in the home office is keeping me busy.

    At 1145:
    FC 14
    Added 22 fl oz 10% to raise back to my target 15. Just read the post above so I will adjust to 16 on the next test. Oops, gotta go do that!

    We plan on swimming today too. I'll be brushing the walls while I'm in there. I need a new brush too. The bristles all fell out of the old one. I liked that 18" with the spoiler on tftestkits.net but it's backordered. Do they all deteriorate after about a year, or did I just get a bad one?

    The ladybug is doing laps around my ladder.
    Intex 16'x32'x54" 17Kgal AGP since 2014. Sand filter, Hayward skimmer, home built 10'x15' deck and stairs, solar heater. High TA tap water, moderate rainfall, weekly use. Treated with 10% bleach, MA and some dichlor initially. Soon to add borates.
    Taylor K2006C
    Future projects - automatic chlorine pump, online pool sensors, better heater, IGP (maybe)

  5. Back To Top    #5

    Join Date
    Apr 2016
    Location
    College Station, TX
    Posts
    79

    Re: SLAM status log

    1300 FC 15.5 (I MAY have put a little extra in at 1145)

    Added 11 fl oz to get to my new target of 16 ppm FC.
    Intex 16'x32'x54" 17Kgal AGP since 2014. Sand filter, Hayward skimmer, home built 10'x15' deck and stairs, solar heater. High TA tap water, moderate rainfall, weekly use. Treated with 10% bleach, MA and some dichlor initially. Soon to add borates.
    Taylor K2006C
    Future projects - automatic chlorine pump, online pool sensors, better heater, IGP (maybe)

  6. Back To Top    #6

    Join Date
    Apr 2016
    Location
    College Station, TX
    Posts
    79

    Re: SLAM status log

    Somewhat 'before' pic

    Intex 16'x32'x54" 17Kgal AGP since 2014. Sand filter, Hayward skimmer, home built 10'x15' deck and stairs, solar heater. High TA tap water, moderate rainfall, weekly use. Treated with 10% bleach, MA and some dichlor initially. Soon to add borates.
    Taylor K2006C
    Future projects - automatic chlorine pump, online pool sensors, better heater, IGP (maybe)

  7. Back To Top    #7

    Join Date
    Apr 2016
    Location
    College Station, TX
    Posts
    79

    Re: SLAM status log

    1630 FC 15.5
    Added 11 fl oz 10%

    Going swimming!
    Intex 16'x32'x54" 17Kgal AGP since 2014. Sand filter, Hayward skimmer, home built 10'x15' deck and stairs, solar heater. High TA tap water, moderate rainfall, weekly use. Treated with 10% bleach, MA and some dichlor initially. Soon to add borates.
    Taylor K2006C
    Future projects - automatic chlorine pump, online pool sensors, better heater, IGP (maybe)

  8. Back To Top    #8

    Join Date
    Apr 2016
    Location
    College Station, TX
    Posts
    79

    Re: SLAM status log

    Forgot to put in the 1430 test.
    FC 13.5. Added 54 fl oz.

    Went swimming with 5 bather load from 1700-1930.
    Test at 1945 FC 11.0
    Added 160 fl oz 10%!

    Sun is almost down so I'll top it off as soon as it goes down and get a final reading. Then check again before sun comes back up for the OCLT. Although at this point there's not much use. The water looks worse than before I started so this is going to take a while. I might be better served just servicing the Chlorine until I give up for the night and save the OCLT for tomorrow.

    For the 5 or so hours I'll be asleep, do you like to overshoot the target or just live with sub-shock levels. My daughter just turned 1 so I'm not interested in getting up through the night to feed the pool bottles. I've had all I need of that.

    I still have a floater and some tri-chlor left over from last year. I could load that up?

    The water is like bath water. I expect if I hadn't started this when I did it would have been green by now. 3 weeks ago I was trying to figure out how to heat this water. Now I'm wondering if I should figure out a way to refrigerate it!
    Last edited by welbo; 06-17-2016 at 07:50 AM. Reason: correct chlorine amount
    Intex 16'x32'x54" 17Kgal AGP since 2014. Sand filter, Hayward skimmer, home built 10'x15' deck and stairs, solar heater. High TA tap water, moderate rainfall, weekly use. Treated with 10% bleach, MA and some dichlor initially. Soon to add borates.
    Taylor K2006C
    Future projects - automatic chlorine pump, online pool sensors, better heater, IGP (maybe)

  9. Back To Top    #9
    Peteparker's Avatar
    Join Date
    Jun 2016
    Location
    Albuquerque
    Posts
    30

    Re: SLAM status log

    Very cool to see someone else going through the process!


    Albuquerque, New Mexico - 17k gal, IG vinyl, 3/4 Hayward Super Pump, 18" Hayward sand filter with zeo, Dolphin Diagnostic cleaning robot, TF-100

  10. Back To Top    #10

    Join Date
    Apr 2016
    Location
    College Station, TX
    Posts
    79

    Re: SLAM status log

    Last night's add was done at 1945 and then I didn't do anything else until this morning. This morning I expected to find the chlorine very low since about 12 hours had passed since it was tended to. I took a sample at 0730 and it took 36 drops for a 10mL sample to change over! So I went back to my spreadsheet to try and figure out what is going on and saw the addition recorded from last night as 277 fl oz. That seemed a bit off so going back to pool math and checking again, it showed the addition to be 177 fl oz. Well in truth, I added 1 gal (128 fl oz) then the rest of another gallon that was about 1/4 full (~32 fl oz), so the spreadsheet was wrong. But that means I in fact shorted the needed addition by a little and somehow ended up with more than target FC this morning?
    Problem solved. When I used pool math last night, I used it on a computer I hadn't used it on before. So the web form had all of the default numbers in it. I forgot to change the bleach concentration and it was set to the default 6% bleach. After changing it to 10% bleach, it showed the needed addition last night was only 109 fl oz, so I put about 50 extra oz's in.

    So... my FC last night should have been up around 18 at 1945, before the sun completely set. At 0745 this morning, after sun has come up, it is at 18. That's not the best OCLT method, but it seems to indicate that the pool is not consuming a lot of chlorine.
    The water is getting worse. I can hardly see the bottom now. The pump pressure has not risen any. My confidence is a little shaken. Let's see what the rest of today brings. I won't be able to tend to it every few hours today. Wife can help some though.
    Intex 16'x32'x54" 17Kgal AGP since 2014. Sand filter, Hayward skimmer, home built 10'x15' deck and stairs, solar heater. High TA tap water, moderate rainfall, weekly use. Treated with 10% bleach, MA and some dichlor initially. Soon to add borates.
    Taylor K2006C
    Future projects - automatic chlorine pump, online pool sensors, better heater, IGP (maybe)

  11. Back To Top    #11

    TFP Guide
    Mr Bruce's Avatar
    Join Date
    Mar 2014
    Location
    Greenville, SC
    Posts
    1,798

    Re: SLAM status log

    Some AGPs come with pitiful pumps. Also, have you every deep cleaned your filter? After seeing significant pump performance after doing that myself this spring, I am adding it to my start up procedure every year.
    32K gallon Plaster - 1hp Hayward 2 speed Super Pump - Hayward S200 Sand Filter - TF100XL
    Test Kits - Pool Math - Chlorine/CYA/Target/Slam Chart

  12. Back To Top    #12

    Join Date
    Apr 2016
    Location
    College Station, TX
    Posts
    79

    Re: SLAM status log

    I had a round pool previously and purchased a 2500 gpm pump and sand filter setup for it. When we got the bigger 16x32' it came with the same pump and filter we already had so I just left the new one in the box and used the old one. The pump got to where it would sometimes trip the gfci so I took the old one out and put the new one in its place. I put in the new sand filter too. When I put the old one in originally I used sand from a pile of fill dirt. It blew out yellow clay from the outlet after every backwash for the first few months. This time I thought I could avoid that by using good sand purchased from the box store. It still blew sand into the pool for a while after backwashes.

    So, this being a new pump and sand filter, it could be part of the problem. It has a lot of flow, more than the old one. The filter start up pressure is pretty close to where the old one ran. Maybe the sand didn't settle properly? Or it actually blew too much out? I guess I should take the top off and at least look in the filter.
    Intex 16'x32'x54" 17Kgal AGP since 2014. Sand filter, Hayward skimmer, home built 10'x15' deck and stairs, solar heater. High TA tap water, moderate rainfall, weekly use. Treated with 10% bleach, MA and some dichlor initially. Soon to add borates.
    Taylor K2006C
    Future projects - automatic chlorine pump, online pool sensors, better heater, IGP (maybe)

  13. Back To Top    #13

    Join Date
    Apr 2016
    Location
    College Station, TX
    Posts
    79

    Re: SLAM status log

    The water appears to be improving as of this morning even though I didn't do a very good job on the SLAM yesterday. I'll do better today.

    Pump pressure is definitely coming up. Start up was 8 psi. 25% is 10 psi, right? That's what I'll aim for for backwash. Coincidentally (or not) the end of the green band and the start of the yellow band is 10psi. I'm at just a little over 9 right now. Flow is still good. I'm just glad to see it going up. It tells me it is working.

    I think there'll be a swim and a good brushing in today. The seams along the bottom need another going over for sure.

    I had my eyes open underwater last time we swam while at shock level. It was very comfortable but they were a bit dried out after the swim for a while. Guess I'll use goggles this time.
    Intex 16'x32'x54" 17Kgal AGP since 2014. Sand filter, Hayward skimmer, home built 10'x15' deck and stairs, solar heater. High TA tap water, moderate rainfall, weekly use. Treated with 10% bleach, MA and some dichlor initially. Soon to add borates.
    Taylor K2006C
    Future projects - automatic chlorine pump, online pool sensors, better heater, IGP (maybe)

  14. Back To Top    #14
    Peteparker's Avatar
    Join Date
    Jun 2016
    Location
    Albuquerque
    Posts
    30

    Re: SLAM status log

    I thought it was bad to swim at slam levels. Is it okay after all? What is your CYA level?


    Albuquerque, New Mexico - 17k gal, IG vinyl, 3/4 Hayward Super Pump, 18" Hayward sand filter with zeo, Dolphin Diagnostic cleaning robot, TF-100

  15. Back To Top    #15

    Join Date
    Apr 2016
    Location
    College Station, TX
    Posts
    79

    Re: SLAM status log

    I've seen a few of the TFP old timers say it's OK to swim up to SLAM levels.
    My CYA is just under 40 so I have a Shock of 16.

    The pH is around 7.1. That may have been harder on my eyes than the chlorine. But other than that, no ill effects on anyone.
    Intex 16'x32'x54" 17Kgal AGP since 2014. Sand filter, Hayward skimmer, home built 10'x15' deck and stairs, solar heater. High TA tap water, moderate rainfall, weekly use. Treated with 10% bleach, MA and some dichlor initially. Soon to add borates.
    Taylor K2006C
    Future projects - automatic chlorine pump, online pool sensors, better heater, IGP (maybe)

  16. Back To Top    #16

    Join Date
    Apr 2016
    Location
    College Station, TX
    Posts
    79

    Re: SLAM status log

    After a 3 day SLAM my water is no better. Still very cloudy. We went for a swim yesterday. I swam all along the bottom with some goggles and found a thin layer of silt that had settled. It looks like DE to me. There is also still a lot of sand. So I'm pretty sure I just wasted a lot of chlorine and time doing a slam when all I needed was to fix my filter. Well at least I'll know what's involved if I ever have to do it again. That experience will keep me motivated not to get into the position of needing it ever again hopefully.

    So now I'm going to take the filter apart and try to figure out what went wrong with it. Maybe the sand is too coarse. I have other I can put in that's a lot finer. Maybe a mix of the two would be best?
    Intex 16'x32'x54" 17Kgal AGP since 2014. Sand filter, Hayward skimmer, home built 10'x15' deck and stairs, solar heater. High TA tap water, moderate rainfall, weekly use. Treated with 10% bleach, MA and some dichlor initially. Soon to add borates.
    Taylor K2006C
    Future projects - automatic chlorine pump, online pool sensors, better heater, IGP (maybe)

  17. Back To Top    #17
    Texas Splash's Avatar
    Join Date
    Jun 2014
    Location
    South-Central Texas, Marion/San Antonio
    Posts
    12,928

    Re: SLAM status log

    I thought it was bad to swim at slam levels. Is it okay after all?
    It is okay to swim up to the SLAM level. The stabilizer still helps to protect you and the pool from the harsh effects of chlorine.

    As for the filter, it sounds like a good idea to inspect it to ensure the laterals are intact and nothing has been compromised to allow sand to escape. Sand, as long as it was #20 silica pool sand, should never go bad, although sometimes from season to season a good thorough deep cleaning is required as seen on the Deep Cleaning a Sand Filter page. Sand itself however shouldn't contribute to cloudy water if it's algae-related, although a deep cleaning can help in overall filtration efficiency.

    When in doubt, perform an overnight (OCLT) test. Good luck!
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
    If you enjoyed your TFP experience, please consider donating to Support TFP!

  18. Back To Top    #18

    Join Date
    Apr 2016
    Location
    College Station, TX
    Posts
    79

    Re: SLAM status log

    As I mentioned a post or two up, the filter and sand are new so cleaning would not accomplish much except to rearrange the sand in case it did not settle properly when I set up the filter this year. I think replacing at least some of the sand is the best bet at this point. It is clear that it is not filtering properly.
    On the plus side, once I get it filtering properly, it will promptly start filtering out the DE on the floor and suspended, which should make it even more effective.
    Intex 16'x32'x54" 17Kgal AGP since 2014. Sand filter, Hayward skimmer, home built 10'x15' deck and stairs, solar heater. High TA tap water, moderate rainfall, weekly use. Treated with 10% bleach, MA and some dichlor initially. Soon to add borates.
    Taylor K2006C
    Future projects - automatic chlorine pump, online pool sensors, better heater, IGP (maybe)

  19. Back To Top    #19

    Join Date
    Apr 2016
    Location
    College Station, TX
    Posts
    79

    Re: SLAM status log

    Wow. The filter only had about 1/4 of the sand left in it. No wonder the flow was so much better through this one.
    Laterals look OK. Only thing I can figure is during the backwash and rinses I did during startup a lot got pumped out. Anyway, I bet fixing this solves all my problems.
    Intex 16'x32'x54" 17Kgal AGP since 2014. Sand filter, Hayward skimmer, home built 10'x15' deck and stairs, solar heater. High TA tap water, moderate rainfall, weekly use. Treated with 10% bleach, MA and some dichlor initially. Soon to add borates.
    Taylor K2006C
    Future projects - automatic chlorine pump, online pool sensors, better heater, IGP (maybe)

  20. Back To Top    #20
    Texas Splash's Avatar
    Join Date
    Jun 2014
    Location
    South-Central Texas, Marion/San Antonio
    Posts
    12,928

    Re: SLAM status log

    Fingers-crossed - good luck!
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
    If you enjoyed your TFP experience, please consider donating to Support TFP!

Page 1 of 2 12 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •