Help my fish is dying and he’s not old I just have him aquarium

Guppy problems (again !) / Male guppy stays at the bottom of

I just put sand in my aquarium. Will the pieces floating eventually

I was going to show off my pretty killifish but it became fish

Is this Lion Fish dead? Mystic Aquarium 4/25/23

Foam forming at the surface of newly-cycled aquarium? Nitrate

Sick fish after adding new fish to the aquarium. Cottonmouth?

Aquarium (1896)

My first aquarium

My first aquarium

I found this fish in my Dad's aquarium. Any idea on what's wrong

did i just witness snail porn?