not sure if anybody knows what it is. It's a cool little skimmer, but it's loud AF lol. it could use some "improvements" to anybody looking for a little DIY project (silicone on the "removable baffles"). It's really clean and runs well. I had it on my ten gallon before I upgraded. I'm asking $20 or some trades for frags, a wrass, a goby, or hermits.
http://www.fishtanksdirect.com/rio-t...FQ6dfgodBzIKtg