If the intake tube is about the same size as the ones on an AquaClear, the Fluval Edge pre-filter sponge might fit over it. It takes a little 'persuading' to get on, but works like a charm. I have to wring out and rinse mine a couple times a week or it gunks up pretty badly (it's a fine sponge) on my 40g breeder with about 40 nano fish and 100-200 RCS (I stopped counting a long time ago, I just know there's a ton of them). The shrimp love to hang out on the sponge and pick out all the good stuff!