I have never had a brackish water tank before. But I bought a fish from the pet store and was told it was freshwater and it died. come to find out it was brackish. This has been many many years ago and I still cant find the fish no where. I want to set a brackish tank up but i know nothing about it. the fish i had and want to get more of was a bumble bee Gobi please all the advice i can get will be greatly appreciated.