With the suggestions and tips from this forum, I did setup my first saltwater aquarium,
a 20 Gallon with Live rock,and live sand . Its been setup for over 7 weeks.
I have 1 small percula clown,4 small damsels(a 3 stripe,yellow belly,domino,greem chromis), 2 turbo snails and 3 hermit crabs.
The biggest of all fish is the Domino damsel.
I do 10% water changes every week. I feed fish with Brine shrimp or fish flakes every day.Couple of days back I changed the aqueon filter with a new one.
Yesterday nigth, the dmonio damsel was behaving strangely by moving very slowly around the aquarium. Usually it was the most active fish other than the Clown.
It died could of hours later. I could see on of its eye was swollen.
What could be the reason for it. I tested the water and all the parameters were normal. However I do not have a NitrIte test ket.