FISH DYING AND BREATHING HEAVY

[reefcat]

That is a very good assumption because it is almost two years old now, but how can I prevent that from happening again when I put them back in.

[cwatkins]

Slowly siphon the sand bed and ensure you are stirring up the deeper sand. In theory it should suck up and remove any gasses.

[daniella3d]

It is usually a problem with deeper sand bed and usually the sand on that spot become sort of black or dark. The way to prevent this is by having sand sifting snail, like a conch or something limilar. It will go inside the sand and aerate it.

How deep is your sand? It if is only an inch or 2, I doubt that's what hapened.

Originally Posted by reefcat

That is a very good assumption because it is almost two years old now, but how can I prevent that from happening again when I put them back in.