Hell if I know, I got the tank and stand for 100 bux from a classified ad. I just enjoy the hobby.
Go big or go home. Bigger tanks are easier to care for, so don't wuss out and just get a 10 gallon. You will have to do more frequent water changes and substrate cleaning.
Tetra: 4 Lampeye, 5 Neon
Danio: Glofish (4 Blue and 3 Orange)
Rasboras: 4 Harlequin
2 African Dwarf Frogs
The exotic Plasticus Fakecilimous.
Pain is temporary, pride is forever
I had a octagon tank many years ago and it was awesome, then I lived in Europe for 4 years, then I didn't. So I got another tank, this time a bigger one.
Keeping anemones in a reef tank can be a challenge if you are not fully prepared.
Cultivating a nano tank can be an exciting challenge but unless you choose the right fish for your tank, you may be in trouble.
When you see signs of stress in your fish, you can then take steps to identify the source of that stress and then to resolve it before it becomes a major issue.