I need to clarify something about my water changes. The water is removed at about 8 inches from the bottom. My tank is a stock watering tank that you can get at any feed store. It has a threaded hole at the bottom. I used galvanized pipe to pipe a recirc line from the bottom to over the top ending in a brass valve. The discharge tubing off the pump in the filter box goes up through the pipe which I back filled around with aquarium sealant. I just have to screw a water hose onto the valve and run it out to the flower bed to pump the water out.

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