Cant get my alkalinity down enough

pitmanr2003

Well-known member
May 21, 2010
143
Im starting a swg system and my alkalinity was 150 when i started. I lowerd ph to 7.2 and it got down to 110. need it around 80. this has been for a day now. I am aerating now to get ph back up or should I keep it low so alk will come down more. How do I get it to come down more?
 

JasonLion

TFP Expert
Platinum Supporter
LifeTime Supporter
May 7, 2007
37,880
Silver Spring, MD
Aerating to bring the PH up is the correct thing to do. You can't add more acid until the PH comes up. Lowering TA can take a while.
 

pitmanr2003

Well-known member
May 21, 2010
143
Ok. So when I get it up to 7.5. I bring it down to 7.0. And continue that process until I get alk where I need it
 

pitmanr2003

Well-known member
May 21, 2010
143
ok got it. thanks. darn intex pump does not have enough spunk to break water much. So it will take a little while unless I can find a cheap fountain or about 10 kids. lol
 

pitmanr2003

Well-known member
May 21, 2010
143
no. i wanderd if that would work. I thought of going and buying a cheap one at walmart, but didnt know if it would work well. I want a fountain, but I dont know if any of them will work with a intex easy set pool.
 

pitmanr2003

Well-known member
May 21, 2010
143
well my ph went back up to 7.5 so I lowered it down again with dry acid to 7.0 but alkalinity went up. it was 100 and now its 120. I dont understand how. Im going to recheck maybe i made error.
 

Richard320

TFP Expert
LifeTime Supporter
Jan 6, 2010
20,396
San Dimas, CA (LA County)
pitmanr2003 said:
well my ph went back up to 7.5 so I lowered it down again with dry acid to 7.0 but alkalinity went up. it was 100 and now its 120. I dont understand how. Im going to recheck maybe i made error.
A common complaint here. It's probably static electricity on the R-009 reagent. Wipe off the tip with a wet paper towel between drops. Do a search for "static" down at the lower right of the webpage and you'll find it comes up a lot!
 

pitmanr2003

Well-known member
May 21, 2010
143
I did that. I checked it again and got 100. I must of miss counted. I always stop adding drops once it changes from green. If I add more drops it gets redder. Do I count till it goes red or just when it changes slightly
 

anonapersona

TFP Expert
LifeTime Supporter
Nov 5, 2008
2,598
pitmanr2003 said:
Ok its higher than I thought lol. I think its gonna take a while. Ha
You really don't NEED to make any effort at this TA, just let the pH go up then bring it down. You can let it get higher than 7.5, I let it go to 7.8 then drop it to 7.2.

Be careful about going to 7.0 because as the TA lowers then the muriatic acid required to change pH is less. So, be certain to test TA before you lower the pH by much for if you overshoot and get 6.5 instead of 7.0 you might do some harm.
 

Miranda

Well-known member
Jan 20, 2008
161
Northeast Florida
The kids had alot of fun "inventing" PVC fountains. Just start with a male adapter that will screw in your return fitting (1 1/2" standard) then add pieces to bring it up out of the water and change direction. My favorites:

Cheap no drill fountain: threaded male adapter>>street elbow>> foot of PVC>>22.5 degree bend (DVW type)>>threaded female adapter>>screw in your eyeball. You can position it vertical for very high waterworks, or just a bit above horizontal to rifffle the surface.

Redneck Model T: threaded male adapter>>street elbow>> foot of PVC>>Tee>>(2) one foot long pieces of PVC>>2 caps. Drill 1/8" along top part of tee, at a 45 degree angle.

You can also use those flexible bendy pieces that look like adjustable drinking straws (I think they are made for sink drains). Or you could just go to Walmart....... but what fun is that? I lowered my TA from 230 to 80 in as couple days with the model T (and 8 gallons of acid a quart at a time)
 

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