Just bought the salifert test for calcium and tested water at 360 ppm. my other cheap test says 450 ppm. I believe the salifert, so i want to add b ionic, but a little confused it says that 1 ml per gallon will bring calcium up 16 ppm . so if my math is right i need 120 ml to bring calcium up to around 400 in my 46 gallon tank this just seems like alot of liquid to dump into tank. can someone say if this is correct or not, thanks in advance