I have a 5 gallon Fluval Spec tank that I used to house baby guppies and shrimp at one point in that I'm planning to restart. Does anyone have any stocking and scaping suggestions that could work well in the tank?

My main issue is with water temperature as I'm dealing with fluctuations around 25-31c (approx 75-88f, yeah it gets really warm) all year round as it stays hot here all year round and the tank is in my bedroom so it gets affected by the airconditioner as well.

I'm hoping to keep a fish or invertibrate still if possible, although I wouldn't want to get them if they wouldn't survive well in the tank and I may end up going for an all planted tank if nothing else would work.