Items that I've bought for my 5 and 10 gal fish tanks.
The fish are happy and active with this tank heater. Adjustable knob on top makes it easy to adjust the temperature to their liking.
HITOP 25W Adjustable Submersible Aquarium Heater
Visually stunning addition to the tank. My Betta absolutely loves to sleep in this and rest in the entry ways.
JIHAQUA Ceramic Cave Betta Fish Tank Decor
I bought this when my Betta started to get fin rot. Will help with bacterial infections. Is good for when bringing new fish into a tank, as well as to stop any diseases from being transferred to an already established tank.
Api Melafix Freshwater Fish Bacterial Infection Fish Medication