Fluval 4plus filter

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Well I'd like to use it if I can just because I already have it. I figure it will move the water around enough to get more debris into the canister filter.
 
They are great filters. Strong flow, you can use just foam in the filter chamber, better than the U series that replaced the plus as the internal filter from Fluval.
 
So if I use the fluval plus along with a fluval 405 do you think I'd be good for filtration? Have you had any experience with sponge filters?
 
I don't think a 405 is enough for a 90. I have two on my 75 and I wish I hd just gotten one FX5. The need some help, at least with flow.
 
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