Quote Originally Posted by jenner View Post
No, I have not had to use PH increaser ever. My PH is pretty constant at around 7.4/7.6 with my TA usually around 120. For the past few weeks due to my TA going up to 160 I've been using the Muriatic acid + airating method for bringing the TA down. That seems to have worked as my TA is now lower.
jenner, it is unusual (actually impossible, as far as I know) for TA to go up unless you add pH increaser that is sodium carbonate or add alkalinity up that is sodium bicarbonate or you refill water that has evaporated with fill water that is high in TA. Adding Borax makes the TA go up a little, but not much. Have you tested your fill water and is it high in TA?

Richard