Hi I am new to the page. what brings me here is a net search. I live in Pittsburgh PA and I have an 18" iridescent shark. Shes around 10 yrs old and in a 5 gallon tank. The problem is she's much too big and keeps flipping out and hurting herself. I have taken everything out of the tank aside from the heater and filter. This morning during an episode, she broke the heater and sent shards of glass everywhere. I am at my wits end and I'm looking for some advice....sending out an SOS....