ok! well i have a fish tank and i do not have fish in it right now because i am trying to make sure that it is good for the fish. and i am going to get a water test kit thingy from the store but u dont have one right now. so far i have a 50 gallon tank, 3 plants, rocks from petco, a filter, tap water (but i put the dechlorinated drop things in it), i have the bubbles, and this thing that makes the water the exact tempature it needs to be. other than the water kit and testing is their anything else that i should need because i need to know so i no when i have everything so i can get the fancy goldfish that i really want!?