Hi everyone, I'm trying to set my tank for a pair of rams. I did a water test and my GH is way too hard so I got some driftwood to gently lower it, and I also noticed my KH is in the low range. I read that that's bad if you have live plants, which I do. So, my question is, is there something I can do to gently lower it like shells without making my water any harder? Thanks!