Nitrates are 0-12 ppm. I think that's right. It's either yellow or orange on the nitrate test kit. Salinity is 1.021. I do have a heater, but I don't think the quoted temps on the heater are right, meaning if I set it at 72 for example, it seems to stay on all the time. I have it set to 68 and it only turns on during the "night" part of the cycle. The T5's keep it warm during the day. By the way, I've never seen it get lower than 72 in the tank. To answer your other questions, what was listed above were the only livestock in quarantine. No other fish. The tank is a 20 gallon long. Here is the picture as requested. As a warning, it's a sad sight.