Any reason the whole floor space isn't covered by the UGF plates? You don't really want any dead spots...
It would be best.....even better if you made it RUGF.....
depends... how big is the tank, and what type of goldfish?A reverse functioning powerhead would be okay?
Other than that is the setup okay for golfishes?
Please advice
How large of a tank are we talking about here?
As Rb said a RUGF is superior to a normal UGF. Just buy a powerhead that has a reverse function and get a prefilter sponge.
depends... how big is the tank, and what type of goldfish?