Photo by Bill Longshaw
I use a sponge pre-filter on the intake of my Fluval 205. I do this for a two reasons. First, I use it to keep small fish from getting sucked into the intake.Second, I use it to filter out large debris before it reaches the filter.
The smallest fish I have are neon tetras, so there’s no issues with getting sucked into the intake. I do, however, have lots of plants in the aquarium. Duckweed is free floating, and leaves detatch from plants. I like to keep that out of my canister filter.
There’s nothing special about the sponge. The sponges I buy are cheap and fairly generic, with a hole in the middle that fits right over the intake basket. You can use pretty much whatever type of sponge you want.
I clean my sponge everytime I do a water change. If I go too long between cleanings, the sponge clogs up and the flow from the filter is reduced.
Do you use a sponge pre-filter? What kind?
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