I had to partially tear down my tank to net a sick Flame Angelfish for quarentine and treatment. After finishing I noticed the water level in the tank had dropped so I added some fresh - this knocked the salinty a little low. According to my refractometer it needed about 1 cup.
Not thinking, and in a major rush to get to work on time I dumped a cup of Instant Ocean into the tank. Some of it got on my open brain coral. The coral instantly shrivled smaller and it seemed like it hurt it. Would this be something that could hurt or even destroy the coral?
Considering the live in saltwater - and the salt dissolves in a matter of seconds or minutes and I cant see how it could.