Mine is made of some kind of black material, don't know what kind though. I also got the tank second hand, and the guy I got it from got it second hand, so I guess I got it third hand?
Also have another question for you reefers.
I bought a lighting fixture today, second hand, its a 48" Nova Extreme T-5 Fixture. I was wondering if I could just get another one and be fine with lighting, as I want to turn it into a reef tank, with a few SPS near the top of the tank. If it's not could I get another 2? I light it since I can fit it into the canopy without having to use a retrofit kit. So if I order two more in a few weeks when I get my powerheads and pumps would it be fine? That would be ideal. I can't really tell if mine has 96 watts or 108 watts? But do you think that could be worked out so I could have what I want in the tank and so I can get my lighting needs down.