I just set up a new 30 gallon(long) tank. New Filter, gravel, heater, plants and two castles for decoration have all been rinsed and cleaned properly for the setup. I let the tank run for three days before putting my fish in there, on the fourth day I put in my 3inch rainbow shark and my inch long red finned shark, i know its not wise to put these species together b/c of possible conflict but they are pretty much to themselves, they must have made a good first impression when introduced or something i dont know, whatever. So the next day i wake up to see the water cloudy, not very cloudy but more of a hazy, so my nitrogen cycle started. Its been hazy now for 3 days. I went and got this chemical called bacter-vital, anyone hear of it. I got it b/c my girlfriend just got new 5 g tank and we used it for hers new tank, so i put it in mine for the hell of it. The guy at the local aquarium said it would be very beneficial for both mine and her tank. Has anyone heard of it or had any experience with it. Any feedback would be great.