Recently I have been adding 1 quart of Muriatic acid a week. Thanks so much! Will try it to increase the TA and watch the PH at 7.6. I had a service which wasn't maintaining new pool properly. That's when I took over. It was their negligence that caused my pool to scale. They weren't adding salt to my pool! I don't even think they were testing the PH level.
Well, I'm glad to read that you want to take care of your own pool. Once you learn the TFPC Method, your pool (and wallet) will be much better off!
Adding acid and running all those waterfalls/spillways is what is lowering your TA. You may not have to add anything to your pool (aside from acid) if you can adjust the amount of aeration your water is getting. Depending on your fill water your TA could just naturally increase on it's own.
Please describe to us what your daily and weekly pool routine is like and what features are running on your pool.
Use PoolMath and you can do your own CSI calculations. It's a very handy tool and it lets you vary each parameter to see it's effect on your water chemistry. The bottom of the page has a What-If calculator (what happens if I add XXX oz of YYY chemical...)
As to your comment about salt, once you establish the concentration of salt appropriate for your SWG, you should not ever have to add salt on any regular basis. Salt level only decreases through water loss, either from backwashing your filter or through heavy splash out.
Since you say your service did a bad job and you're new to pool care, I would highly recommend the following -
1. Read through as much of PoolSchool as you can, focusing on pool water chemistry and chemicals;
2. Make sure you have proper water testing equipment on hand. Since you have an SWG you should have a way to test your salt levels. You can either use AquaChek Salt Test Strips or there is a Taylor drop reagent kit. Your regimen for salt testing should be a monthly basis and/or after drain & refill.
3. Ask questions on these forums. Folks will always be willing to help. However, always be prepared to post your latest water chemistry numbers.
4. Make sure your profile and signature are up to date with your pool specs and equipment so people helping you don't have to search for that info.
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