Ok so i was home for lunch and the fish eat before i do...anyway i feed the fish 1 cube of frozen tubiflex worms, 2 cubes of bloodworms, and one cube of spirulina brine shrimp. that stuff gets real messy so i turn off the 2 penguin 330's so the filter pads dont get foul. well i was turning them back on and only one came on. i had this problem before but i can't remember what i did to fix it. i know i didn't have to buy any parts...i just cant remember what was wrong....i mean i dont even hear any buzzing from the motor...did i kill it? im not worried about oxygen levels b/c i have an eheim canister running on it also. can anyone help me fix it? i dont wanna have to buy another one.