I originally wanted to do a reef tank but now believe I'll just try a fish only tank. I have a 46 gallon bow front. Do I need live sand for the substrate or can anything other than that do the job? I'm planning to just get rocks n cured coral from my local fish store for decorations. I understand the cycling process, patience, patience etc. The lights are a simple strip light that came with the tank so may upgrade that a little. I will need a larger hang on the back filter for it, thinking of a large whisper. Obviously in a 46 probably a few smaller fish of course, my wife wants a sea horse but I understand they might be too much for a semi beginner.