I'm currently working on lowering my TA to add borates eventually also. I'm curious, how do I prevent overshooting my TA goal? I've been testing my TA with a 10mL sample, in 25ppm increments. I'm between 100 and 125 now, and figured once I test between 75 and 100 I'll start testing with a 25ml sample. Up until now, I've just been dumping as much MA as PoolMath tells me I need to get my pH down from wherever it is to 7. As I approach 60 though, I'm going to want to try to dose it just right, and PoolMath doesn't seem to tell me how much MA I need to get down to a certain TA. It just tells me to knock my ph down and aerate.