View Full Version : Calcion supplement question

09/20/2017, 05:16 PM
Not sure if Calcion is considered a good calcium supplement but I have some and I've been trying to figure out how to determine how much to add based on the advanced instructions. it says each ml will increase concentration of calcium in 1 us gallon of water by 40ppm but I don't know how to calculate that based on my tank - 60 gal with 15 gal sump. Is it 75/40 = 1.875ppm per ml?

Thanks guys!