Can anyone tell me if a prefilter (mine is the sponge type) is necessary on
a pond fountain pump (Beckett 535 GPH) or is it okay to just go with a
regular bio filter directly to the pump. I will only be using this on a 160
gallon preformed pond.
From all the previous post I've read, prefilters (at least not the sponge
type) don't seem to be too popular or a pain keeping it clean.
Thanks in advance for your comments.