Undergravel Filter?

[bmorecopper]

I was thinking of putting an undergavel filter in an already established aquarium (44 pentagon) that has CC for a substrate. Would this be beneficial at all? Or should I save my money?

 

[pgreco]

I would not recommend it, espically if you are gonna start a reef, cleaning it will be a major task if not impossible. Save your money

 

[fshhub]

see other post, no neeed for 2 of the same just confuses us too much