I just got a 50 gal
high top tank. This thing has a big black box that goes from the bottom to the top of the tank. Inside are two filter pads that are about 2 foot high, rolled up, and are wrapped up in a black mesh of some sort. The lady i got this from has had it since 1995 and told me that this was a protein skimmer, but when i searched for them i got something completely different. One of the filters is very dirty and i cant seem to find out what they are, let alone how to go about finding a new one or trying to salvage this one. Any help would be VERY appreciated.