I have been scouring your website off and on for weeks and have tried to follow every piece of guidance I could glean from your great pool school, pool math and similar issue post responses.
My situation: I have a 7 year old, plaster pool in east central Florida, no water features, inside of a screen enclosure. My acid demand has gone from a cup per week to 6/wk in the last year or so! Even when I completely shut off the CL generator for a couple days, PH still goes up. I used to be able to check the pool weekly and results were pretty stable.
I had been using a 2yr old K-2005 test kit but recently updated to a new K-2006 with no noticeable changes in results except for CYA (see below). I record all test results and chemical additions. Latest results:
FC 5.0
CC <0.5
PH 7.5
TA 60
CH 370
CYA 80
Borate ~30 Need more borate after lower and refill (see below)
Salt 3700
CSI = -0.47
PH seems to go up about .15-0.2 per day
Water is crystal clear. I certainly can tell heads / tails on a dime at the bottom of the pool.
CYA. My old CYA reagent had an expiration date of 08/20 and the new kit date is 04/21. I had used the old kit to adjust from 50 to 80 to match TFP recommendation. With the new kit, I got 120! Retested with remaining old reagent and got 80! Called Taylor and they said both batches tested “perfect” at the factory but to go with the newer reagent results. This forced the lower and refill with about 3000 gal. Salt and CH are back where I had them and am ordering more boric acid to get back to 50.
How much aeration does it take to dramatically raise PH? I have a “small” suction side air leak that is minimally worse than 3 or 4 years ago. Most of the time I can easily count the 1/8” diameter bubbles coming into the pool. A lot of the time there are no bubbles and occasionally they come in in bunches but just doesn’t seem like much air. It doesn’t seem to make any difference whether solar heat is on or off, SWG on or off, drawing from skimmer or main drain or both. I have trickled water over all above ground suction side joints and the pump basket with no discernable change. I can see small bubbles coming into the basket from the inlet, but not a “stream”. I have reviewed the “How to: Suction Side Air Leaks” but haven’t taken anything apart or done any digging yet. All I can hear when I get close to the valves is water flowing and pump vibrations. The pool isn’t losing any water beyond evaporation.
None of the adjustments made to get to TFP recommendations seem to have changed the acid demand trend. I’d sure welcome any guidance that could at least stop the rise in acid demand.
Thank you.
My situation: I have a 7 year old, plaster pool in east central Florida, no water features, inside of a screen enclosure. My acid demand has gone from a cup per week to 6/wk in the last year or so! Even when I completely shut off the CL generator for a couple days, PH still goes up. I used to be able to check the pool weekly and results were pretty stable.
I had been using a 2yr old K-2005 test kit but recently updated to a new K-2006 with no noticeable changes in results except for CYA (see below). I record all test results and chemical additions. Latest results:
FC 5.0
CC <0.5
PH 7.5
TA 60
CH 370
CYA 80
Borate ~30 Need more borate after lower and refill (see below)
Salt 3700
CSI = -0.47
PH seems to go up about .15-0.2 per day
Water is crystal clear. I certainly can tell heads / tails on a dime at the bottom of the pool.
CYA. My old CYA reagent had an expiration date of 08/20 and the new kit date is 04/21. I had used the old kit to adjust from 50 to 80 to match TFP recommendation. With the new kit, I got 120! Retested with remaining old reagent and got 80! Called Taylor and they said both batches tested “perfect” at the factory but to go with the newer reagent results. This forced the lower and refill with about 3000 gal. Salt and CH are back where I had them and am ordering more boric acid to get back to 50.
How much aeration does it take to dramatically raise PH? I have a “small” suction side air leak that is minimally worse than 3 or 4 years ago. Most of the time I can easily count the 1/8” diameter bubbles coming into the pool. A lot of the time there are no bubbles and occasionally they come in in bunches but just doesn’t seem like much air. It doesn’t seem to make any difference whether solar heat is on or off, SWG on or off, drawing from skimmer or main drain or both. I have trickled water over all above ground suction side joints and the pump basket with no discernable change. I can see small bubbles coming into the basket from the inlet, but not a “stream”. I have reviewed the “How to: Suction Side Air Leaks” but haven’t taken anything apart or done any digging yet. All I can hear when I get close to the valves is water flowing and pump vibrations. The pool isn’t losing any water beyond evaporation.
None of the adjustments made to get to TFP recommendations seem to have changed the acid demand trend. I’d sure welcome any guidance that could at least stop the rise in acid demand.
Thank you.