Tap Water Test

[chem geek]

What about my TA at 190? Will it come down with my Ph?

As waste says, you're doing fine and know what you are doing. If your pH were 8.4 (a guess, since you only know that it's > 8) and you added enough Muriatic Acid to get the pH down to 7.5, then your TA would drop from 190 to about 175. So though the answer is "yes" that the TA will drop along with the pH, you can see that it won't drop down very much. As waste says, the aeration at lower pH will get your TA down -- just remember that your pH will "fight" your wanting to lower it and will continue to drift up rather quickly (when starting at lower pH) until your TA gets lowered. That just means you'll be adding lots of acid over time. To accelerate the process, do the aeration (such as your waterfall) with the ph low as per Ben's Lowering Your Alkalinity instructions. So until you get your TA lowered, you can add acid to have your pH around 7.0 or whatever is just above the low end of you pH test kit.

Richard