So I have a 10 gallon tank that is currently set up as a freshwater tank, whose inhabitants will soon be moving to a 29 gallon. I've always wanted a saltwater tank and am thinking of a fish only tank. What, if anything would I be able to have in a ten gallon? What, if any are the problems I might face converting the tank? I plan on doing a complete takedown of the tank if I decide to do this...replacing the substrate with marine live stuff, starting the tank with ocean water. Will the current freshwater heater do the job? What about the filter? I have the smallest tetra whisper filter on the tank and it does a good enough job for freshwater but I'm assuming the requirements are totally different. I like striped damsels and the cheaper clownfish (not sure what species) and those are what I would prefer but if it's not possible in a tank this small then I would consider other fish.