It took me a minute to figure out how to refill! Install the pump about 6 inches below the inlet, empty into a bucket on the floor, close the outlet valve - prime the pump about 6 times, wait 10 seconds, open the valve, wait about 30 seconds, the flow should begin, direct the outlet to the tank, and then you can install the canister. on the floor works every time, i've had mine for about 30 days. I have a giant red-eared slider in a 55 gallon tank about 1/3 full (she gets out a lot, in the tub and on the sundeck in her large tub). Flush it out today and it wasn't too bad - I change some water every day and change all the water every two weeks. You can hardly hear how it works!
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