Levels way off again, help update

[StirCrazy]

Originally Posted by danny zubot

Water change Sunday, approx 25%, salinty 1.023-1.024, temp 82.
Mondays diagnostics: Calcium=220 ppm, Alk=2.5 meq/L, Ph=8.4
Added 40ml calcium,
Added 7 tbs CaCO2: 1 tbs CaCO to add Alk and
bring PH down.
Tuesday diagnostics: Calcium=160 ppm, Alk=7.0 Meq/L, Ph-8.6
Added the same dosage above.

now the big question, have you tested your Mg levels? if this is low you will never get your Ca up, and from your readings I will guess yours is about 700 to 800 PPM instead of the 1300ppm it should be. see if a friend or a store that uses a good Mg test kit can test it for you.

Steve