Something else I wanted to add. I need some good ideas for substrates, something very widely available. I will be going to town next week so if I have a few ideas I might be able to find something. I won't be able to find anything brand name, the stores there don't even carry Flourish products and looked at me like I was nuts when I asked for Flourish Excel the last time I was out there, so I need some more *generic* ideas. Something that will add gh and kh would be great, water from the tap is 0 on both.