Wow, you can keep that many fish in a FW
tank?? 8O For SW
, it is quite different. Depending on species chosen, the general guideline for SW
fish stocks is 1" of fish for every 5 gal
of tank less the tail. It is a good rule to try and follow but it is not rigid. Basically you would be looking at about 4x 2-3" fish. Keep in mind while calculating the amount of fish potential, it is with the adult size in mind not the actual fish size at the time of purchase.
Changing over from fresh to salt is basically starting over for the most part. Depending on filtration, heaters and PH
's that would be about the only salvagable equipment other than the tank.
Substrate, decorations and any rock/wood should be removed. As mentioned above other items may be needed depending on tank type chosen and could run a few hundred easy.