i own 12 of them they are excellent and keep your tank clear and clean. just make sure to check the spray bars that squirt water on the bio wheels the small holes need cleaned now and then if you dont your bio wheels wont spin. you wont regret this filter ebay is the cheapest to get them brand new and used ones are also available. i buy all my aquarium filters on ebay and save lots of $$$$$
I took the whole filter off about a week ago and and cleaned the impeller hole out because it wasnt up to par in water flow..it works great now but spray bars werent working before and arent working after...im browsing the web for clues..found a site that tweaks these units for a more optimum performance but ...not sure why..heres the site.. http://www.cichlid-forum.com/articles/power_filter_tricks_v.php anyone got the answer to WHY they do this trick?
Well...The holes werent plugged but out of curiosity..im going to take system off the tank again and break out the magnifying glass!...tehee...my curiosity is way up there now...GRRRRRRRRRRRRRRRRRR!!!
Back to Martin's Q, I think that they are a wonderful filter and I agree with RodinCA. They are alot cheaper on Ebay I bought 2 on Ebay for the price of 1 in a lfs.