Try around 1.5 to 2 mins backwash, and 2 mins rinse. Six minutes is going to run your pool down very noticeably. Great after a big rain when you need to drain some anyway
Will do, though I would like to loose some cya and salt [emoji848]
Small Pool Build - Brisbane, Australia [emoji1037]
- Thread starter riley00dog
- Start date
Will do, though I would like to loose some cya and salt [emoji848]
- Jan 4, 2016
- 5,392
- Pool Size
- 44000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
Just took a sample and tested the basics. Ph is 7.5 after yesterday’s acid dump by the pool company. FC had was 1.5 after being .7 yesterday as measured by company. Going to dump a litre of chlorine in before bed and run the pump on manual for half an hour or so. Noticeable difference though today in the fact that the water no longer feels slimy. I’m not sure what that’s about but everyday until now my hand has had a slimy feel to it after taking a sample. I think I’m on the verge of needing to slam. Going to get this FC right up to the top of range and see what happens. With the pool maths app I’ve been entering effects of but it never tells me effects on csi. Currently at -.47 which I’m not concerned about just a day or two ago it was -.25 and I’m not sure what has caused the change. The lower ph?
Ok. Just dumped 2litres. It’s meant to raise FC by 9.9 which will give me 11.4. Range says 4-12 so still within.
- Dec 17, 2017
- 667
- Pool Size
- 36000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Astral Viron eQuilibrium EQ45
Doing an OCLT...?
With regards to your CSI - Plug in and then change values in the calc and you will quickly see which ones affect the CSI the most (eg CH).
With regards to your CSI - Plug in and then change values in the calc and you will quickly see which ones affect the CSI the most (eg CH).
- Jan 4, 2016
- 5,392
- Pool Size
- 44000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
You can test for algae anytime by following this procedure: Overnight Chlorine Loss Test. Usually a good idea before considering a SLAM. Yep, pH has the biggest effect on CSI, and don't worry about CSI unless you see it below -0.6 (for now). Getting FC up to the correct is number one, so good thing you've added some liquid. The added chlorinating liquid will have raised pH a little, helping the saturation. It will drop back down as chlorine is used up, but hopefully the SWC will take over and keep the FC up. And yep, 10ish FC is a good number right now. I forget, are you using the PoolMath app? If so, you can tap CSI in Overview and play with the numbers there.
Yes, planning to test again in the morning if I get a chance. Will tear again shortish as it’s been in for over an hour now. And yes pump is on! I pretty know that it will drop too much. If I slam it won’t be until the weekend. Will just keep chlorine at high end of recommended until then. Poor kids still haven’t had a swim yet.
Do I just do this is the log section or effects of? Effects of doesn’t list csi as a changed value when I mess with ph or fc but they are the only values that have changed since yesterday and csi has changed. It’s all good, I will get there. Just wish I hadn’t been handed a pool in this state.
Thank you! I just retested and I am kind of a little shocked that the FC is now exactly what I was aiming for - 11.5. Very impressed with how accurate pool maths is! Swg is cranked. I figure much better to dial it back slowly as long as I keep an eye on. Good info on the csi. Yes using the app.
Didn’t pass the OCLT which I had a feeling I wouldn’t. FC late last night 11.5 and first thing this morning 9. Will bring it back up to the high end of range before work. Can’t do a slam until the weekend. Will just do my best to keep the chlorine up until then. SWG hasn’t had a cycle since I bumped the chlorine so hoping it will add a a bit today while I’m at work. It’s seemed fairly efficient in the past.
- Jan 4, 2016
- 5,392
- Pool Size
- 44000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
Liz, I haven't seen anything in your chemistry so far that would preclude swimming, but I can't speak for the water temperature Algae is a nuisance but not a health hazard so if helpful for the kids to get the urge out of their system, go jump in!
Regarding SLAM Process, be sure to read and follow the written instructions. There's a video that gives a rough illustration, but the written instructions are the gospel. I like to add one thing, and that's to start at pH 7.2 because the chlorinating liquid temporarily raises the pH. Starting at 7.2 will also reduce the total amount of chlorine you'll use for the SLAM. You'll have to shut off your pH dosing because it will go crazy trying to figure out what's happening.
In early April, I did a SLAM at CYA 80 (neighbour's irrigation ran for 30 hours and overflowed our pool with garden runoff). It went pretty quick, around 2.5 days, so I'm hopeful yours will be quick and smooth. Great advisers here in the thread to walk you through it, any time of day or night
Algae is a nuisance but not a health hazard so if helpful for the kids to get the urge out of their system, go jump in!Regarding SLAM Process, be sure to read and follow the written instructions. There's a video that gives a rough illustration, but the written instructions are the gospel. I like to add one thing, and that's to start at pH 7.2 because the chlorinating liquid temporarily raises the pH. Starting at 7.2 will also reduce the total amount of chlorine you'll use for the SLAM. You'll have to shut off your pH dosing because it will go crazy trying to figure out what's happening.
In early April, I did a SLAM at CYA 80 (neighbour's irrigation ran for 30 hours and overflowed our pool with garden runoff). It went pretty quick, around 2.5 days, so I'm hopeful yours will be quick and smooth. Great advisers here in the thread to walk you through it, any time of day or night
Liz, I haven't seen anything in your chemistry so far that would preclude swimming, but I can't speak for the water temperature
Regarding SLAM Process, be sure to read and follow the written instructions. There's a video that gives a rough illustration, but the written instructions are the gospel. I like to add one thing, and that's to start at pH 7.2 because the chlorinating liquid temporarily raises the pH. Starting at 7.2 will also reduce the total amount of chlorine you'll use for the SLAM. You'll have to shut off your pH dosing because it will go crazy trying to figure out what's happening.
In early April, I did a SLAM at CYA 80 (neighbour's irrigation ran for 30 hours and overflowed our pool with garden runoff). It went pretty quick, around 2.5 days, so I'm hopeful yours will be quick and smooth. Great advisers here in the thread to walk you through it, any time of day or night
Will definitely follow the instructions to the t. Will get ph down first. I’m not sure my auto dosing acid is actually working anyway. I had the pool company check it on Tuesday and it tested fine. It has made no attempt to drop the ph though. It just rises until I manually dose though the chlorinator or by hand. A problem for another day. Now do I let the boys swim then slam or just get the slam over and done with then let them swim is what I’m trying to decide? Weather is meant to be cold and drizzle over the weekend so thinking of getting the slam over with staring on Friday night after work.
Liz you can start the SLAM today. So long as you can test and dose 4 times during the day.
-when you have your first cup of coffee
-right when you get home
-right after dinner
-right before bed
It might take a little longer but yours will be a short one due to not seeing any algae. You can even use your SWG to keep the FC up during the day.
Kim
-when you have your first cup of coffee
-right when you get home
-right after dinner
-right before bed
It might take a little longer but yours will be a short one due to not seeing any algae. You can even use your SWG to keep the FC up during the day.
Kim
You can let the kids swim through the SLAM- it is safe to swim up to SLAM level for your CYA. My family have done it a couple of times with no ill effects.
Liz you can start the SLAM today. So long as you can test and dose 4 times during the day.
-when you have your first cup of coffee
-right when you get home
-right after dinner
-right before bed
It might take a little longer but yours will be a short one due to not seeing any algae. You can even use your SWG to keep the FC up during the day.
Kim
Really? Ok. Have already left for the day but hoping to be home a little earlier than usual. Will pick up more chlorine on the way home. Will get another 15 litres on top of the 8 or so I have left. It’s not far to go if I need more. Will need to bring the ph right down first. Should be able to get maybe 3 tests/doses in before bed then will do 4 times tomorrow as you suggest. In the weekend it can be much more frequent.
- Jan 4, 2016
- 5,392
- Pool Size
- 44000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
First things first, if you can, go online and order some more FC testing supplies from CCL, because you'll go through them fairly quickly.
Chlorine Titrating Reagent, 50mL Clear Choice Labs and
Chlorine Detection Powder, 10g Clear Choice Labs
If you have something to measure 5 ml, that will be very handy, or maybe buy a little medicine measuring cup or 5 ml syringe at a chemist. Then each drop = 1 ppm FC which is very handy when SLAMing at a high level. Get comfortable with your CYA level. Say it's 80 ppm CYA, then you'll be SLAMing at 31 ppm FC (62 drops at 10 ml sample size vs. 31 drops at 5 ml sample size)
Yep, swim before, during or after. One of the principles of TFPC is keeping the pool open as much as possible. That said, a cloudy weekend with no swimming will make the SLAM go faster and require less total chlorine.
Chlorine Titrating Reagent, 50mL Clear Choice Labs and
Chlorine Detection Powder, 10g Clear Choice Labs
If you have something to measure 5 ml, that will be very handy, or maybe buy a little medicine measuring cup or 5 ml syringe at a chemist. Then each drop = 1 ppm FC which is very handy when SLAMing at a high level. Get comfortable with your CYA level. Say it's 80 ppm CYA, then you'll be SLAMing at 31 ppm FC (62 drops at 10 ml sample size vs. 31 drops at 5 ml sample size)
Yep, swim before, during or after. One of the principles of TFPC is keeping the pool open as much as possible. That said, a cloudy weekend with no swimming will make the SLAM go faster and require less total chlorine.
Too tell you the truth it is best to start at night to me..........that way you are not fighting the sun for the FC!
Kim
Kim
- Jan 4, 2016
- 5,392
- Pool Size
- 44000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
Ok. Have ordered the whole chlorine kit. Was cheaper than buying individually.
Not sure the kids will want to swim on the weekend with the weather but good to know if they really want to they can.
Question re MA. I know I need to drop the ph to 7.2 or there abouts before I start as testing is not reliable mid slam. I can manage to bring it down no problem. What I’m wondering is should I give it an approximate dose of MA each day? Yesterday for example ph was 7.4 in the am 7.5 early evening and 7.8 late in the evening after dumping all that chlorine. If it climbed that much with a relatively small amount of chlorine added compared to what’s in a slam I am thinking maybe I should add a certain amount each day I’m slamming even though I can’t accurately test it.
Too tell you the truth it is best to start at night to me..........that way you are not fighting the sun for the FC!
Kim
Well that works out well then!