Stumped

[Puppiesonacid]

Ok, numbers..

CYA- 60
CH-250
TA- 60
CC-0
FC- 8

Everything is great, pool looks wonderful

I left one number off because...

PH 8.4

Was 7.5 last week, got about 6 inches of rain (cause of a gutter as well as rain) really about 3 inches of rain, in the pool the last 2 days. but... this isn't the first time it happened. PH just jumps like crazy all the time.

No aeration at all anywhere on the pool, no pumps no slide water running into it or anything.

I have dumped so much Muratic acid in the thing this last month to get the TA down from 100, to 60 and cause the PH jumps almost .8 points in a week. did the same when it was 90's does the same if it doesn't rain, rains, doesn't matter.

any ideas? I am quite sure after today the TA will be around 50, and the PH will be back down to 7.5 with half a gallon of muratic acid i added this morning. Is this just a fluke thing? Maybe the sand filter is adding lots of air that i can't see?

PS... I guess the rain could have done it, splashing and all, but it does it with or without the rain, and the rain is PH 7.0 ish, I tested it once a month ago or so

Thanks.

 

[Texas Splash]

Consistent and heavy rain could effect pH a bit, and so could lots of splashing and activity if consistent enough. Your pool (plaster) is not new correct? You could still let the TA fall to about 50. That might help. I test my pH just about everyday as it's so important to preventing scale/corrosion.

 

[setsailsoon]

I had similar problem over here in Florida... new pool and lots of rain storms. It's finally getting to a reasonable amount of MA required... around 8 oz twice per week. As Splash recommends, reducing my TA helped significantly. I let it run 40-50.

I hope this helps.

Chris

 

[Puppiesonacid]

Consistent and heavy rain could effect pH a bit, and so could lots of splashing and activity if consistent enough. Your pool (plaster) is not new correct? You could still let the TA fall to about 50. That might help. I test my pH just about everyday as it's so important to preventing scale/corrosion.

yea. i guess i blame this time on the rain... the other times were what stumped me. As in hot and sunny, no rain, and it would go up in a week. I notice it when the FC drops a lot in a day for no reason, I check the PH and it is way up....

It is plaster and built in 96'. Will lower it to TA to 50, as it may be there now.

 

[StogieC]

Rain itself causes significant aeration. However, rainwater is generally more acidic and the reduction in TA should also help arrest pH rise. You mentioned a gutter issue. If a significant portion of your rainwater is roof runoff, especially from a tile roof, that may be part of your answer (see report linked below). How did you collect your rainwater sample?
http://www.twdb.texas.gov/publicati...orts/doc/0804830855_RainwaterHarvestingV1.pdf

 

[Puppiesonacid]

Rain itself causes significant aeration. However, rainwater is generally more acidic and the reduction in TA should also help arrest pH rise. You mentioned a gutter issue. If a significant portion of your rainwater is roof runoff, especially from a tile roof, that may be part of your answer (see report linked below). How did you collect your rainwater sample?
http://www.twdb.texas.gov/publicati...orts/doc/0804830855_RainwaterHarvestingV1.pdf

Interesting info, thanks.

A lot is from the roof as i have a well... so when it rains it pours Guess i need to filter it a little more before it goes in... hmmm.

and the rain water was from a bucket on the side of the pool after it rained, it was the only water in it.

 

[domct203]

These are great to catch and isolate the first flush.

Rain Harvesting Pty Downspout First Flush Diverter - Rainwater Collection and Stormwater Management