1) What kind of background to get?
2) How to hide the pipes/heater etc.
3) Any aquascaping suggestions?
4) I'll remove the arowana by summer. What kind of fish to get instead?
I appreciate all the comments! I've taken those photos over a period of 5 months. For the rest of the pictures, you can check the album if you haven't done so already. I'll be taking more pictures once the seashells I've ordered arrive.