Prefilter canister filters?

[Fishlover94]

Does anybody use a prefilter canister filters like the sunsun 602?

 

[Colin_T]

I have cylindrical sponges on the intake of all the external power filters. The sponges stop course things (leaves, etc) and small fish from being sucked into the filter.

 

[Fishlover94]

I have cylindrical sponges on the intake of all the external power filters. The sponges stop course things (leaves, etc) and small fish from being sucked into the filter.

I'm looking at Penn-Plax Cascade Optimizer Pre-Filter for Aquarium Canister Filters