This is what i have used in the past. l stopped using it though because it use to gunk up and reduce the flow into the canister filter, If you choose to use one you need to clean it often. The large fat strainer you're talking about can be removed on most intake hoses making it easier to slip a pre filter over the rigid tube. The best use i have had for the pre filter sponge is to slip it over a piece of electrical conduit and use it to do wipe downs of the inside of the glass while doing water changes without having to reach down with my hands.
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Hope this helps