Ok. I put that 1gallon RO water mixed with 3.5ml mmp to my 7gallons tank, of course i took out 1 gallon prior from the tank. I wait for 30mins, test TDS at 160, and about 6 drops = 107 ppm GH/KH (per api GH/KH conversion chart test) turned to green .
What do you think of that result?
Last edited by Master503; 03-03-2013 at 11:03 PM.