Who Gives A Fish Forums

If you're using a sponge filter, it might not be cycled fully. How long has the tank been running? You might need to add some bottled bacteria to speed things up.

Freshstar wrote: ↑Fri May 16, 2025 1:43 am Thanks for the tips, everyone. I'll check the oxygen and add some almond leaves. Substrate is sand, so that shouldn't be the issue. Gonna keep an eye on the guppy's behavior.

Sand is good for corys. Maybe try feeding them some sinking pellets with garlic to boost their immune system.

Fin nips could be from stress or aggression. What's your stocking like? Also, lethargic corys might mean poor water quality or low oxygen. You got any surface agitation?

Mushroom Corals are low-light, low-flow species. If they're shriveled, it might be too much light. Try dimming the Kessil or raising it a few inches. As for food, I'd skip the reef roids and go for amino acids. Brightwell's CoralAmino works wonders.

I've come across some sites saying fish don't have nerves in their fins, but I'm not sure how accurate that is. Did your fish get hurt?