Eheim produce a modular one that retro fits <"on the filter intake"> - <"EHEIM Vorfilter">, but I think what @Aqua sobriquet & @Maf 2500 had in mind was the "OASE Biomaster" type arrangement, where the <"sponge pre-filter is internal to the filter">, but in a separate "Easy Clean" section <"BioMaster">.In fact I have never seen any filter that comes with pre filter sponge for the intake
Fluval 07 series has an internal prefilter in the canister. Not sure how easy they are to clean as never owned one. I think you still need to open the lid to get to it but certainly a lot less work than cleaning the main baskets.fluvial 207
I’ve put sponge on the inlet pipes for both my Eheim Classic and my Biomaster.Hi all,
Eheim produce a modular one that retro fits <"on the filter intake"> - <"EHEIM Vorfilter">, but I think what @Aqua sobriquet had in mind was the "OASE Biomaster" type arrangement, where the <"sponge pre-filter is internal to the filter">, but in a separate "Easy Clean" section <"BioMaster">.
cheers Darrel