Prefilter + esternal canister filter
I have the Eheim 2271 (EHEIM Professionel 4+ 250) with the Eheim Prefilter attached on the intake.
Now I was looking for some replacement sponges (my anxiety says you should always be stocked up with spare parts/consumables, don't ask
) and this one website said that if you pair up the Eheim prefilter with an external filter you can remove the mechanical filter media and fill the entire external filter with bio media.
Any thoughts on this? I'd like to do that and decrease the number of external filter cleanings.
Is the Eheim Prefilter shrimp safe or should I put something over it?