forgotten to put ? behind. muahaha...

i knw yr tank cant get low PH.

do u knw how to use KH tester or not? 1st drop can't consider as KH1 lar. 1st drop will change the color into light blue. Then you need to continue the 2nd drop...3rd drop..till it change to light yellow. If it change yellow at 3rd drop, mean you only hv KH2.