Massive Alkalinity Drain - Yep.... Adding LOTS of Alkalinity

FlaRod2

Member
Apr 5, 2021
5
Florida
So, I am new to the forum as a user, but have read so many posts on here over the past year, I feel like I have been part of the forum for a long time.

I know there are MANY wicked smart people on this forum and am hoping that someone may have some ideas with my balance problem. First, let me share my current readings (Taylor Test Kit - The strips should not be allowed and NO, I did not get these from the pool store:)).

FC - 5 (a bit too high)
TC - 5
Alkalinity - 120
PH - 7.6
Stabilizer - 35
Calcium - 310
Salt - 3100
Water Temp - 84
Phosphates - Non-existant, less than 100
Orb3 Pool Enzymes

On the Orenda App I am showing an LSI balance of .08.... Hard to get it perfect:)

So, what is wrong? Well.......... I am sitting at the upper parameter of Alkalinity to do my best to lock in PH. Sounds reasonable, right? But, to stay in this region, I am adding 3.5-4.5 pounds of sodium bicarb a week. It is not unusual for my PH to rise .2 or .3 a day. Thus, more Muratic Acid at the rate of a gallon every 7-10 days or so.... Muratic Acid drives down Alkalinity and I am stuck in this loop. IF I leave alkalinity lower (80-90), the PH float is more extreme.

Now, this is a relatively new pool. Maybe 15 months old. I also do have an "automatic" acid feeder. I say "automatic" because while the Sense and Dispense system does add acid automatically, it takes a lot to make it work properly, and keep it running. If anyone wants more information about this system, I can write a book. Needless to say, I manually calibrate my PH probes and clear error messages on the "PH" on the OmniLogic several times a week to keep it running. So, I have not been using it, in interest of trying to solve this problem.

I do have a couple things with the pool that could be causing the PH to float up. An SWG that runs about 10%-15% of the time on a filter run time of about 11 hours a day (3 hours at 90%, 8 hours at 50%) AND my hot tub (in the pool) overflows to the pool with a drop of a few inches.

My hunch is the hot tub overflow is causing aeriation and that is driving PH, as well as the SWG. But, still this seems dramatic.

I am thinking of turning off the SWG for a couple weeks and put a Chlorine tab floaty in the pool to see if things calm down? Does anyone here have any thoughts or has ever seen this before? Any advice is appreciated because I literally CANNOT find anything on the web that talks of this problem.
 

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
37,182
Laughlin, NV
Pool Size
6000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
Welcome to the forum!
Keep your pH in the 7's. Ignore TA as long as it is 50 ppm or higher.
Why turn off the SWCG? It has little effect on pH. Aeration from the spillover has a far more dramatic effect. Your automation should be set up to only run the spillover a couple times a day for 15-30 minutes each.
I suggest you read ABC's of Pool Water Chemistry.
 

FlaRod2

Member
Apr 5, 2021
5
Florida
Welcome to the forum!
Keep your pH in the 7's. Ignore TA as long as it is 50 ppm or higher.
Why turn off the SWCG? It has little effect on pH. Aeration from the spillover has a far more dramatic effect. Your automation should be set up to only run the spillover a couple times a day for 15-30 minutes each.
I suggest you read ABC's of Pool Water Chemistry.
Thanks for your advice. I will look at the ABC's again. Hmmmmm.... How to stop the spillover and still exchange the water in the Spa... I will have to look at the equipment and see if I can pull it all back through the Spa drain instead.
 

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
37,182
Laughlin, NV
Pool Size
6000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
see if I can pull it all back through the Spa drain instead.
Not what I mean. You still need to run the spillover so you take chlorinated pool water and displace the spa water with it a couple times per day. Your Omnilogic automation should be able to be programmed for that.
 

FlaRod2

Member
Apr 5, 2021
5
Florida
Thanks for your advice. I will look at the ABC's again. Hmmmmm.... How to stop the spillover and still exchange the water in the Spa... I will have to look at the equipment and see if I can pull it all back through the Spa drain instead.

Not what I mean. You still need to run the spillover so you take chlorinated pool water and displace the spa water with it a couple times per day. Your Omnilogic automation should be able to be programmed for that.
Haha... That is what a logical person would think. There is nothing in the "current" programming for it. Sooooooooooo..... I need to speak to Hayward to give me access to the magic menu and hopefully, they can give me the manuals they give their service guys. I needed to do it anyway, but..... Now I really need to get into the guts on how this operates or wait a month for a pool company to come out (I hate being dependent on the pool company). I appreciate the advice on this though. I figured it had to be one or the other.