Rated 4.4 out of 5 by 5
Rated 4 out of 5 by Pisces51 Good Deal
I found the cartidges easy to set up. However, it seemed to me that the pre-filled cartridges had more carbon in them than what is provided in these packets. It is more economical to use these, than to buy the pre-filled cartridges.
August 28, 2016
Rated 3 out of 5 by Guest101101 Great Product but Missing Parts
I love the Topfin brand but when I got this it only came with one frame where it says it comes with 2.
July 13, 2015
Rated 5 out of 5 by DebHouston Great
Worthy & cost efficient
March 7, 2014
Rated 5 out of 5 by 1FishFellow Great Price
I had considerable difficulty finding a store that carried TOPFIN filters or cartridges---as it turns out this is a PetSmart product offered in their stores ONLY or online (which was my choice for ordering) The price for a year's supply was very reasonable and comes out to $1.25 a month which is a great value (my size was LARGE and smaller ones are less cost). They are simple to change, no mess, no worry.
February 13, 2014