Since I live in Fresno, CA, our water here isn't exactly soft...(btw, if anyone knows where I can get RO water I'd be grateful...). What are some hardly plants that would look good in my 20G tank that won't be effected by harder water? I'm just starting the planted tank up and am looking to put together a good aquascape. Also, where can I order online that doesn't charge a lot for shipping? Locally, I can't seem to find much aside from the few the chain stores carry...thanks.