RollendChang said:
Ok, so tell me how to aclamate the tank to bw I will move the barbs to my other tank.
first of all, what size tank is it? The moray willl need at least a 45-50g tank to be happy. The grow to about 3' and are quite territorial. Tankmates for these guys are at a premium.
You'd need to set the tank up like you would a marine tank, meaning crushed coral or aragonite substrate, calcium based rocks and NO driftwood. Eventually you're going to need to go SW so any plants are a no no. Caulerpa is a possibilty once you've reached full SW.
First off for acclimation you'll need a full range hydrometer (1.00-1.030), a 200g bucket of marine salt. Preferably coral life, instant ocean isn't a very good brand and coral life is the next cheapest. Coral life is also one of the best brands out there. You'll need a rubbermaid container that's about 25% the amount of water in your tank, a seperate heater and powerhead for it. Gradually raise the specific gravity 0.002 ppm every week, no more than that or you'll kill off the bio filter. Raise it until you've reached 1.015, there it will stay until the moray is about 1.5 years old to 2 years old, then you'll raise it to full strength SW (1.019-1.023).
Feed him frozen silversides, krill and cut up store bought seafood. STAY away from feeders, they may be ok for fish like oscars or larger cichids (even though they're bad for any fish hardier fish will do fine on them) feeder fish are not only often full of disease and infection, but they're fatty and un-nutritional. The moray will do wonderfully on the foods I mentioned.
For some more info on Gymnothorax tile read this article here
http://fishinthe.net/html/forum/viewtopic.php?t=3627