So, I asked about stocking for my 5 gallon Fluval Chi in the fresh water general forum and dougall mentioned turning it into a pico reef with a Pom Pom crab. I know nothing about salt water but it's something I would like to try one day so I started looking online to see about turning it into a saltwater tank and the posts I found said I had to take off the existing waterfall filter. I understand that the filter wouldn't be useful but do I really have to get rid of the water fall portion?