I have the 3 baskets set and top for a Fluval 203 canister filter part A15760 . These are the older styled filters from the 90's
They also work great for filtering in your sump with carbon, phosphate removers and/or other media for your Fresh or Saltwater aquariums. The baskets easily un/lock in place with a simple twist. Easy to pre-rinse your media before using
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