Top critical review
Several products had quality issues, but good product for price, it is cheaper to buy new than replace parts
on January 29, 2016
Excellent price on Amazon Prime. Comes with a bio filter and tube extension, everything you need. Great flow! Bought six, (4) 40's, (1) 30, (1) 20, two "used" and saved few bucks but made a terrible noises that could not be troubleshot away. Had an extra impeller, and replaced it, to eliminate noisy pump. The cover did not fit properly. Contacted the seller and they said they had not experienced these issues before, and made no recommendation for resolution.
02/17 - Lowered 5 star rating to 4 for that reason.
06/17 - Bought the Whisper Filter - 20, for a temporary 10 gallon set up, it was missing parts, media, and leaked all over the place since it was not assembled right. This also made excessive noise. Cover did not fit properly.
Lowered rating from 4 stars to 3 star rating!
Note: The Whisper 40's are the highest quality, but do not allow fit of the hood and lighting on the micro tanks. A plus: all model filters come with a Bio-sponge, which make this filter a 3-way media filter (Bio-sponge, Polishing Bio-bag w/carbon).
Because the fiber bio-bags tend to deteriorate - even after a month, recommend utilizing the universal reusable "media bags" of various mesh, installed on the frame, holding the carbon/ ammonia remover, keeping the media contained.