Okay, new fish mommy isn't quite true. I have three wonderful thriving bettas in 5 gallons that are doing wonderfully! But I just got a 50 gal from a friend who was otherwise going to sell it on craigslist, and, well, I was concerned that they would die in the care of a stranger! It has tetras, danios, plecos, clown loaches, and HAD a betta who died shortly after arriving, I assume from the stress of the trip?? It was a rocky ride. :C She gave me ALL the stuff-- a gravel vac, filter, heater, water conditioner, salt, etc etc, even frozen food. Now, the tank was in poor-ish condition when I got it. Algae everywhere, cloudy water... I've cleaned it up pretty nice, for the most part (no cleaning chemicals, of course, good ol' fashion tank scrubber and gravel vac) I conditioned the tap water and slowly added it back to the tank a gallon at a time, and the surviving fish that didn't belly-up from the stress of the trip seem to be doing great. I went to test the water-- then realized, I have NO IDEA what the ideal parameters are! I have an API test kit, I just want to know what the ideal Nitrates, Nitrites, PH, KH, and GH levels are for these fish. I want them to have the best care possible! And, is there anything else I should know? I want to be the best fish mommy ever.