Why is my ph always high?

[Themacdadt]

Is there something wrong with my chemical balance? All chemicals are in range but for some reason I am always having to add acid to lower my ph. I use almost a half gallon a week. Everything else stays fine. But like I said I'm averaging 1-2 cups a day of acid. Is this normal beacause of the swg?

Any in put would be appreciated

 

[Patrick_B]

That is very normal and it happens faster in newer pools. Still, your makeup water probably has higher pH & total alkalinity (TA), so this plays a large role in pH rise.

Other factors like the SWG do contribute as well, but this is the basic reason. As the TA works down, the rise will slow, but you have to work on it to reduce the TA. There is an article in Pool School on how to do that. Having it lower in a salt pool is a prudent thing to do, largely for the reason you inquire about.

 

[ping]

Post your full test results and we will see if anything can be adjusted to reduce the acid usage.

 

[jojoman]

Is it a new pool or a replastered pool, both can rise ph for about a year or so. From what i read the SWG can slowly rise ph too. I'm in the same boat, with 1/2 gallon of acid every week but down from a gallon a week after pool pool was finished back in September. Also, are you using a good test kit to get your readings? I found test strips were okay at ph reading but a good test kit will pen it down better.

 

[pooldv]

Also, running waterfalls, spillovers, laminar jets, etc will increase your ph.

 

[umpalumpajay]

Also, running waterfalls, spillovers, laminar jets, etc will increase your ph.

I see the OP signature says 4 FOOT DROP on waterfall. cool! but you might be getting a TINY :joker: bit of aeration off that sucker.

 

[Themacdadt]

Post your full test results and we will see if anything can be adjusted to reduce the acid usage.

Fc 4
Cc .5
Ta 75
Ch 330
Ph 8.2
Cya 65
Hardly ever run waterfall, spillover on spa is 1 inch, only spilling over 4 hours a day when pump is running and its a smooth transaction.

Not re plastered, pool is approx. 8 years old. SWG on 40%

 

[JasonLion]

Letting the TA go down to 60 will certainly help as would running the spillover less of the time. If that isn't enough, adding borates and lowering the TA a little further should do it.

 

[Wandersen]

My pool has an auto doser for the acid which keeps the PH pretty well exactly at 7.4. This is connected to a 15l (4 Gallon) drum which lasts about 8 weeks - so I am using the same amount. I also have a SWG and the pool is only small (8000 gallons).