Hello everyone. I am working on my 75g reef and Dad wants to start a planted tank(will be mainly his tank). We were looking at different tanks to decide what we liked best and I think were are going to go for sort of a minimalist look. But when I was talking to my sister(she knows quite a but about FW, I know more about SW)she said many of the plants I want will require injection of CO2. So, how difficult would it be to set this up and how much would it cost for a 20g L? Anything special I would need? -test kits -RODI water -Hagen HOB filter -Seachem Flourite substrate Boy, this brings me back to the early days of saltwater...: So many cool things, which I know nothing about. haha Can someone recommend a good freshwater forum too?