thanks JettsPapa. my pH is 7.0 - 7.2 and I was planning on a temp of around 79-80. Hardness is 8-10. I'm not "committed" to Gourami's, rainbow fish or rainbow sharks (or anything really at this point). Which is why I'm here asking for input. The list is what my preliminary research and interests brought me to. While I know there are no guarantees, forums like this are invaluable for applying the experience of others so as to avoid "silly" mistakes. So, thanks to all and please, keep sharing your wisdom....