I picke up a Cascade 1500 off ebay new that i was going to use for a fish only. I have since change my mind on the use, it will be used for carbon and to move water for a frag tank. Anyway when it showed up i just looked in the box and didnt take it out. After a month i just opned the box and noticed the bottom of the filter is cracked. The guy on ebay told me to call Penn-Plax, i did, left a message. They just called asked me for the part number & my address and said they would be sending it right out today(free of charge)! No questions asked! I have no idea how this item will work but they get a A+ for the Service Dept!