I'm thinking very minimal decor given 75g is about the smallest recommended for a single oscar environment. I'd like a dark substrate that's fine, but not sand. Maybe some flat rocks and I'll float some wisteria and water sprite. Probably a stick/tape on background with some design. A non-glass heater a big Aquaclear HOB and the existing Aqueon 50 I have. Prolly going with an eBay 48" LED light.