From The Aquarium Wiki
Hello, I read that to increase the GH value I can use a composition of MgSO4 + CaSO4 in the ratio 1: 3. But how the addition of this compound change my value of GH?
Good afternoon, this isn't really a great fourm to ask questions, we are more of an information repository :). Try https://www.reddit.com/r/aquariums . Don't forget to help improve the article by updating it with what you learn :) --Brian (talk) 17:39, 18 April 2016 (UTC)