I JUST GOT A TON OF FEEDER SHRIMP AT JAYS AQUATICS,COULDNT BELIEVE THE PRICE.iv'e kept these before throughout the entire winter in a large rubbermaid type container, using a hang on filter inside that i fit into another plastic container to protect the motor w/a rock to keep it under water,a heater that kept it around 65 degrees and aeration.worked perfectly and never ran out of food for my octopus .he was a very happy camper!