I did my first aquarium water change today, since its empty tight now and would need done in a few days anyway.
Dumped it out sprayed it out with the hottest water my kitchen sink has to offer. Cleaned the rocks, plants, changed the filter thingy, etc. refilled, treated with tetra betta safe.
Is there anything else I should do to make sure the aquarium is ok for other fish? I'm scared to stick another fish in the aquarium since Fishelstein was in there and we don't know why he is sick.
I have no idea what I am doing. No kidding.