problem maintaining proper parameters

[mrcopitr]

Hi ,

I seem to have a real hard time maintaining proper parameters in my 90 gal reef. (mostly LPS, softies and a few clams)

I've been using the reef chemistry calculator to help me out, but it only seems to push my PH down when I add the suggested calcium and buffers (I ues ESV B-ionic two part solutions).

my calcium has been in the 350 ppm range and the alk is in the range of 7.7 to 8.5....I've been adding the suggested quantities by the calculator, to bring the paramters where I want them (i.e calcium 400ppm and Alk to 10-11) but it only last for a few hours and then it falls back on the lower side bringing the PH down with it.
My magnesium reading are in the 1200-1250 range.

I'm also dripping kalk 24/7 (top off water), could that play a role with the unstable parameters and suggested dosing by the reef calculator.

I hope to hear your comment ....and suggestion...Thanks Marco