Cascade® Filter Replacement Cartridges for Cascade® Hang-On Power Filters, 3-pack

Does the job. Make sure to rinse. They can make the water cloudy. If you have a lot of fish, they can get dirty quick like any other filter.

We use the 150/200 filter for a 20 gallon hexagonal vertical goldfish tank. We have three goldfish, which are dirty creatures, but our tank always looks crystal clear. I rinse the filter in the sink about every other week and we vacuum/change 5 gallons of water every week.

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I have a cascade filter, and have always just used Whisper filters but I thought I would give the "real" filter cartridge a try. I am going to use these up but I will not be buying them again. The whisper cartridges you can add more carbon to them if you want, these are completely sealed so no way of adding anymore carbon to them. In general the Whisper filters just seem to keep the tank clearer/cleaner. They do work but just not as well as the Whisper.

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Great filter for my 20 gal tank with 10 Tetra's. I have used these filters for 10 years...always work and do a great job.

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PERFECT FIT FOR MY CASCADE 300!. EXCELLENT PRODUCT!!!... 100% RECOMMENDED. THE WATER IS CRYSTAL CLEAR!... ACTIVATED CARBON EXCELLENT!!... GOOD PRODUCT