09-22-2006, 05:20 PM
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oily-look on the surface of the tank
Around a week ago, I got a hard coral to the tank, couple days later, on the surface of the water, there is something like oily covered on the water. The fishes are stressful. they jump very fast whenever they see people. I wonder what happened. I tested the water and it seems to be fine.
My first guess is there is no Oxygen so the fishs get stressed?
How to treat this problem and how to prevent this oily-like dust on the water surface? You input is truly appreciated.