hey guys well im new here so first off my name is Anthony, well i've been dealing with FW tanks for a few years now and got a 10 gallon tank to start a salt walter setup, i got crushed coral for the substrate, and i also used instant ocean and the salinity is almost perfect, i have a regular bio wheel filter and regular lighting, i had the water running for about a month, then decided to buy a damsel the first 2 days he was fine but 2nite when i got home he was at the bottom of the tank, i hope this doesnt mean he is dying.. well anyways i know i have to buy a test kit for the nitrates and stuff, but can anyone help me in telling me what i should do to setup my 10 gal as a salt water in case this damsel dies so i can do it right? thanks in advance