hi teresa, theo is right on with his question. i'm sure ted told you all this but i'll mention here for reference.
in a pond with alot of muck build-up, if you just installed it, started it up and left it going, you could potentially kill your fish with all those nasty things being churned up.
the recommended guidelines/procedure is to run it about a 1/2 hr the first time, an hour the next day, two hours the following day......etc. until yer where you want to be on runtime.
if i were you i'd turn it off, let the pond sit a couple/three days, and re-start following guidelines. that should help....good luck.
