I have used these filters for several years and found them effective in maintaining the clarity of my tank. Tip; if you reverse the front blue filter panel it will improve the efficiency and the filters will last twice as long.
Verified purchase: Yes | Condition: New
Haven't had it long enough to judge its efficiency, but it is appears to be much more condensed than the original cartridge. It should do a fine job.
Verified purchase: Yes | Condition: New
Did not work. Just made grinding noises
Verified purchase: Yes | Condition: New
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