i got a 20 gallon tank from GF family about 2-3 mths ago and everything is fine. the only thing is the tank doesnt hav a rim at the top. the tank did come with a kinda lid with a light but it just sits ontop of the tank and a few times the light has almost fallen into the water. i was wondering does anyone know of a place i can buy a rim for the top of the tank, or any DIY tht might wrk. srry if i explaind myself poorly.....