I use dry acid only because its safer to store, wondering why you say not to use it?
Finally using a real test and super high CYA
- Thread starter BraveJhawk
- Start date
- May 3, 2014
- 62,725
- Pool Size
- 6000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
Acid - Further Reading
www.troublefreepool.com
OK thanks good reading, I will make the switch.Acid - Further Reading
what is the percent active Muriatic Acid that is suggested for pools?
- May 3, 2014
- 62,725
- Pool Size
- 6000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
The best value is 31.45%. But if you do not use the acid often and prefer less fumes, get the 14.5%.
So it the home depot product ok for pools or do I need a different grade?
- May 3, 2014
- 62,725
- Pool Size
- 6000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
Home Depot sells muriatic acid. Be ware of the 'Green' brands as they are an unknown, low concentration.
Steve-D
Bronze Supporter
- Jul 10, 2020
- 161
- Pool Size
- 20000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
I've been using Klean-Strip Green from Home Depot. It's 20% so in the "effect of adding" section in PoolMath I use the 31% MA option and multiply the recommended volume by 1.5.
- Jun 8, 2019
- 4,581
- Pool Size
- 20000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
This - the MSDS says 20% muriatic acid for most of those "green" products. It's between the 15.5% and 31% concentrations.
Steve-D
Bronze Supporter
- Jul 10, 2020
- 161
- Pool Size
- 20000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
Home Depot only seems to carry the "Green" [edit - at least at my local store]. So far it does seem to work out to be about 20% based on my last two applications and using PoolMath (adjusting the volume by 1.5x and selecting the 31% MA). FYI, you may be able to find 31.45% "Transchem" brand in gallon jugs at Ace Hardware...it just hasn't been in stock at my local Ace store when I needed it.
[edit] And it turns out the 31.45% stuff at Ace is less expensive than the less potent stuff at Home Depot.
The pool is looking much better now. I think either tonight or tomorrow night I will try the OCLT and see if it is actually good. I don't see any algae, but did see and remove a dead mouse in the pool (I guess I really am in the country now). The FC was 16.0 this morning at ~9:00 AM after adding LC last night at about 8:00 PM (while the sun was still out).
- Jun 1, 2018
- 16,040
- Pool Size
- 26000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- Hayward Aqua Rite (T-15)
Keep maintaining SLAM Process fc level for your cya until u pass ALL 3 end of slam criteria.
Scrub ALL the nooks & crannies whete algae could hide (light niches, drain covers, ladder handrails etc.)
Run slam level water through all water features & lines for a couple hours daily.
Vac & or brush daily (this breaks up biofilms algae uses to protect itself from chlorine)
Backwash when pressure rises 25% over clean pressure.
SLAM ON
zimdogg
Bronze Supporter
Following your progress here as I need to do a water exchange on my pool as well.
Also, RCJH.
Yep, just finished brushing and can tell it is much easier to brush now. There is some dirt/dust/algae(?) that is brown and comes up when I brush along the bottom. I'm hoping that gets filtered out soon, but I'll continue SLAMming until it does (as well as the other criteria). The only place I haven't brushed is the bottom side of the ladder steps. I just replaced them about a month ago because one of them broke, and the old ones were covered in green algae on the underside (good riddance). The ladder is right next to the return jet where I have been adding LC, so I'm hoping it is getting a good bit of the chlorine. I have the pump/filter running 24/7 while SLAMMing and don't have any water features. Thanks for guidance.
Keep maintaining SLAM Process fc level for your cya until u pass ALL 3 end of slam criteria.
Scrub ALL the nooks & crannies whete algae could hide (light niches, drain covers, ladder handrails etc.)
Run slam level water through all water features & lines for a couple hours daily.
Vac & or brush daily (this breaks up biofilms algae uses to protect itself from chlorine)
Backwash when pressure rises 25% over clean pressure.
SLAM ON
RCJH! And good luck. I did the math based on the Draining article that was linked (measured how fast water drained into a 5 gallon bucket (45 seconds for me) and then took how much water I wanted to drain (40% * 18,000 = 7,200 gal) * 9 sec/gal (45/5) = 18 hours. I drained for 19 hours just to make sure I did enough and overshot my target of CYA 60 and ended up at CYA 50 (which ended up making it easier/cheaper to SLAM).
zimdogg
Bronze Supporter
Based on all of this it looks like I'll have a turnover time of about 18-22 hours depending on my confirmation test of current CYA levels. I've tested at 100-120 before, but then recently thought I tested at 160. Need to retest tonight and start draining/filling.
zimdogg
Bronze Supporter
160 cya, and 22-23 hours to go. Here goes nothin.
zimdogg
Bronze Supporter
I'm targeting 60 CYA. My pool is in full sun almost all day with no cover. Is 60 a good target or shoot lower?
- Jun 1, 2018
- 16,040
- Pool Size
- 26000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- Hayward Aqua Rite (T-15)
You can always add more back if u need to.
zimdogg
Bronze Supporter
Water level dropped a little bit overnight which tells me my outflow is actually greater than inflow but they're pretty close to even. Gonna shut down the out pump around 4pm today and fill the pool to the proper level then get some tests rolling. Still clear, but needs the robot.
Attachments
zimdogg
Bronze Supporter
Success! CYA down to 60. Wish it went a little lower but it's also dark right now so my cya test was done in my garage with bright LED lights. I'll give her another go again in the morning.
Results here. Added LC, a little MA, and that's it. What is it I need to buy for CH? 34 pounds of it per pool math.
Results here. Added LC, a little MA, and that's it. What is it I need to buy for CH? 34 pounds of it per pool math.
Attachments
Be careful on the calcium. Add small portions of it at a time to avoid clouding up the water.
And get some chlorine in the water stat! Calcium can wait.