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Thanks Dean, you give me hope. It seems impossible that that amount of chlorine I have added hasn't consumed the AA by now.

Opening new thread on this because I think my latest issue might have been lost within the original post. Did my first AA treatment and cannot get chlorine to stay in the pool after 6 days. Did AA treatment on Sunday (six days ago). Followed all the instructions and added 32 oz of Polyquat...

Did AA treatment 5 days ago, still can't keep chlorine in the pool. Have been through 6 gallons 12.5% liquid chlorine plus 5lbs of 47% trichlor disolved in bucket and dispersed in water. (Note: I switched to Trichlor temporarily because I ran out of liquid chlorine and it was available. Plus...

Thanks for the info! TA went down to 40 so needed to raise that as well but didn’t notice the effect on pH rise was so small with the baking soda. I’ll test in the morning and switch to soda ash if I still need to raise both significantly. I need to keep TA around 70 to control massive pH...

OK did the AA treatment. Before I did, 45 lbs Calcium Saturday. Water test results as below except CH now up to 380. +24 hours (Sunday) 4lbs Ascorbic acid followed by 4qts Proteam Metal Out. Stains ~75% gone. Pump run without filter media for 3 hours. Cleaned and replaced filter...

Thx, upon reflection I think It’s time to increase CH anyhow so will do that first.

About to do AA treatment after opening pool but looking for advice on water chemistry before. Current numbers: Pool is 29K gallons, IG Plaster. FCH: 0.5 pH: 7.7 TA: 70 CH: 200 CYA: 20 (will raise after AA treatment ) Salt: 3400 (ready to turn-on the salt cell but haven't yet) Water...

Read up on manganese after the suggestion and what I read leads me to believe it unlikely. I learned that manganese tends to change pool water color and that associated stains can be addressed via chlorine slam. Neither of these are symptoms that I am experiencing with this stain. In fact...

No, municipal water. Stain is brown, gets dark-pretty much black to purplish black when I apply the vitamin C, then gradually fades completely away on its own over a 30 min period.

Looking for advise from the forum chem experts on identifying metal stain I’ve been dealing with for a couple of years. I have large brownish stains mostly in deep end around the bottom drain. At first I thought they were organic stains resulting from the accumulation of earthworms that...

Thanks for your reply. I was thinking of trying the scaletec as well. Will let you know if I find success. I'm worried to go too low with the cSI because the top two steps don't have any of the rough plaster (scale I presume) and think I might see some pitting on those surfaces. Scaletec...

Also got lots of rain over winter and have a mesh cover. I guess that could be a difference from previous winters as well.

I'm in Maryland. Been dumping lots of MA in pool first two years. Assummed it was due to new plaster year 1 but had TA of 100 which was probably exacerbating it. Second year I had TA 80 and still used over a quart a week. I'm wondering if part of the problem was the closing Chems. I...

Opened the pool two weeks ago no fuss and all looked good. Pool was built Sept 2010 and have been fighting constant pH creep. Previous two openings pH was high but no scaling issues. This year pH was off the charts high (was 7.4 when i closed). Took 2 gallons muratic acid and 5lbs dry acid to...

Thanks JasonLion. I do not have any automation (yet) and it is not clear that I can lessen the pump run time that much as I prefer running at a lower speed on the VS pump to save electricity. Sounds like the "if it aint broke..." addage is at play here. I do agree that if I had automation and...

This is my first summer with the pool. See signature for configuration. I understand the recommendation and rationale explained on these boards for keeping CYA around 80 for SWCG pool but I am wondering if that is still the recommendation when I am not having problems with CYA at 40 and...

I will check with my builder tomorrow and update with what they say. I'm ok leaving it for the winter but don't want plaster issues.

Hi all. Newbie here with first post. We just closed our new pool for the winter. I had assumed that the closing company would test the water and add acid to the pool to balance the ph before closing and they did not. I had tested yesterday and ph was somewhere between 7.8 and 8.0 with TA of...