I just started my 20 gl. fish tank, and i have a layer of rainbow stuff at the top....

S

sabrina s

New member
...looks kinda like oils.? i only feed them shrimp pellets and flake food. i think its from the uneaten flakes that turn into the film like that, cuz its only at the top. ive only had my fish in the tank for 3 days now, so how do i get rid of the film on the top of my tank, and what can cause it!! help!
 
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