I put too much effort and $ into the bacteria culture to just toss it every 2 weeks just becasue, and the way plants drink in flower there must be a way to balance what I top off. So far a good WAG is working if I use the sap PH to best guess what the plant needs more or less of but I would like to be more percise.

I found this its a decent explanation of where I am going with this

For pH<6.4, consider if there is a need for Ca, Mg, K, or Na. For pH>6.4, consider possible need for phosphates or sulfates. If the proper elements are selected and applied, the Brix reading will increase and the pH will go to the desired area of approximately 6.4.
* EC, measured with the Cardy Twin EC Meter, indicates the level of simple ion uptake into the plant sap. With low Brix crop, if sap EC is too low, elements are not being made available to the plant. Look at the EC of soil/water extract (or ERGS) and take appropriate steps to correct the condition. If sap EC is too high, elements or ions are not being "complexed" and ions such as nitrate nitrogen may be at excessive levels.