Canister Filter.
Also if you want some ,feel free to come over and get some. They are very sneaky and tough to catch though.
Also I wouldn't be suprised if nutrients had something to do with it. I was feeding my goniopora rather heavily and I'm sure that wans't helping ,but the tank has been fallow for over four weeks now ,without a speck of food.
Also no ,I have not looked into prodibio. I think I shall though.
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