On May 1, 2011:
The triple flow corner aquarium filter by Lee's is a good filter but I don't like the air hook-up. You get a air diffuser and it does not fit the air line they provide it breaks or slits open. The airline is to be pushed thru a tripod of plastic prongs which will break off easily. I have cut the airline put a round air stone and put the connector on top of the prongs to connect my air supply. (Please Lee's go back to the old bubble-up filters.)

On February 1, 2011:
Lees Large - (100 GPH - 4"L x 4"W x 6"H) I started using this filter in 1965. I have tried the newer types, but find this filter works better and cost less to maintain. For the cotton I buy a large bag of polyester pillow stuffing which last for ever and works well. I am using this filter in a 30 gallon tank and it handles the cleaning and aeration real well. If someone wanted more aeration you can use a double valve pump and use an aerator on one line and the filter on the other line. I use the double valve pump with both valves on a connector to just the one filter. This is the best filter on the market. It is easy to clean and change cotton and charcoal.

On December 12, 2010:
Triple Flow Corner Aquarium Filter by Lees would be a good piece if the part that holds the tubing would be made better. It breaks easily and the tubing does not hold,making it not usable shortly after hooking it up

On August 29, 2010:
Hooked it up to a power head and it keeps my 55 gal gold fish tank water clear all the time (and i am not locked into buying those filter pads, can use any filter media and any charcoal medium)

On December 17, 2009:
These box filters are great for "dead" spots in an aquarium along with my main filter. They filter out a lot of debris and I find the aeration from them is very beneficial to both the fish and beneficial bacteria. I use bio media and floss only and find them handy if I need to start up another tank fast for an emergency if need be.

On September 13, 2009:
The Lee's Triple Flow corner filter does the best job of any plastic corner filter I have used. I have been in the hobby for 26 years and have tried a few. The three intakes on the sides of the box, low to the substrate, pick up debris easily and keep the water circulating in the tank better than the old style boxes that suck it in from the top of the box. I especially like the hole in the highest corner of the top that allows air to escape when initially placing the filter into the tank, much easier than fumbling with the top to let out the air that keeps the filter from sinking. A-1 in my book.

On March 15, 2007:
IT CHEAP, SIMPLE AND EFFICIENT!