At least I'm pretty sure it's 75g. Either way, I'm new to the hobby sans a few betta fish in my youth. I've read hexagons are pretty limited in suitable species and, being a beginner, I'll be even more limited most likely. What fish can I house in it? And can I cycle the filter in my turtle tank? I won't even be attempting to set this thing up until a few months from now as I'm moving soon and I need to clean it out (was dropped off tonight) on top of having other things to take of. So it'll be put together slowly and give me time to research.