cthetoy
Active member
In Randy's formula you mix 1/4 cup Epsom salt and 7 3/4 cups Dowflake to 1 gallon of water. You use almost 1/2 gallon of that solution to raise 100ppm of magnesium in a 150g tank. Sounds alot but thats how it works. You can use just Epson salt but Epson salt contains sulfates so that is why you mix Epson salt and Dow Flake to balance out the sulfate.