So I've read a few interesting articles on pH and GH in tanks, and want to stop using crushed coral as a fix. I believe that a slight GH buffer is all I'll need, but I'm not thick in the wallet so would rather improvise something. I've heard that epsom salt (magnesium sulfate) is a typical stand-alone hardness buffer. Any input on that notion? Can I DIY a GH buffer with epsom salt and something else?
