OK so I have a Mag 12 for my new 120g. The Mag 12 did not come with any attachments (reducers, etc.). So the Mag 12 output nozzle takes a 1 1/4 inch hose. But the bulkhead that came with the tank is the barbed kind and is too small for the hose. (1 1/4 hose swallows it.) So what are my options? If I put a reducer on the mag 12 so that both ends take say a 1 inch hose will it harm the pump? Better ideas? Thanks in advance.