Using kalk water only for topoff?

[stephane]

Steve IMO you got this problem cause you didn't monitor well you ph and add to much kalk at each time kalk need to be drip and alway monitor with PH

the magnesium pricipitate when the ph is to hight if you add one liter in the sump the ph will climb up to 9 and then go down there you will have precipitation

Kalk is good but if you mess you will crash calcium reactor will crash a tank either but there more documentaion to know how to not mess with it than kalk

I read on farming and there a lot of coral farmer use only kalk for many reason