I jave a magnum 250 and every time it is eother shut off or we have lost electricity it seems to stop working, unfortunately lately with the major storms we have had some problems with the electricity going out multiple times over the past 10 days so i guess I've noticed it more. Then tonight for no reason it just stopped. I blew into the intake valve because it seemed that it only works when the canister is not totally full, but of course this is causing issues with the outake having air in it and it is sending way to much air into the tank. My ciclits are not happy at all. Any advice as to what the problem could be would be appreciated.