[RAZORTEETH]

i am just wondering which is better to help keep the tank clear the bio wheel penguin 330 or the emperor 400 i have a 55 gallon tank with an oscar in it and to it's no surprise he is a messy fish so i am thinkin of going with two 400's and stay with that at the moment i am running a 330 bio wheel and the filter that came with the tank a regent30/60 i believe or thats what the filters are.?

 

[Grosse Gurke]

emp400 is a better filter.
If your tank has been up a while, your penguin filter is cycled. If you remove it and add new filters you will loose most of your good bacteria and your cycle. What I would do is keep the penguin with the biowheels and add an AC500 or EMP400.

 

[RhomZilla]

I'd go with an AC 400 with a 402 powerhead attatched to a prefilter.