David
Neptune, god of the Sea
This doesn't really qualify as an emergency yet... but my 3 platies are gulping for air at the surface of my tank. Which is weird because it's a 46 gallon with very efficient filtration, and the tank they were in at the pet store was much more crowded. Currently I don't have one of those bubble things; should I get one? Will they be fine until I do? I'm kinda worried cause I thought the filter is enough aeration on it's own... go figure.. 
