First time making a proper betta tank

[u/Saric05]

Ive never made a tank before, ive owned bettas before however i was like 10 and wasnt aware of how many requirements i needed to hit, im 20 now and i researched a lot and put a bunch of money time and effort into this. I just maybe wanted tips or maybe even advice to make this better and to keep my plants from dying.

This tank is a 5galled rimless cube and there is a sponge filter and heater in there but no fish yet because im cycling.

My mother got my younger sister a betta and its sitting in a 2.5gal tank currently with petsmarts plastic plants and dyed neon gravel with a small filter and a heater that i put in to make his time a little better while this tank cycles

The betta is a dragonscaled male betta and im determined to give him a better life!