For anyone looking to add a inline tank heater

[Streetbob]

I have a Eheim 2217 canister filter on a 55 gallon aquarium and added a Hydor 300 watt inline heater. The 300 watt heater only comes with 5/8" barb fittings and my tank return hose is 1/2" so I purchased a 10 piece kit of 5/8"x1/2" barbed plastic reducing couplers because that was the smallest pack they had. I only needed 2 so I have 8 left if anybody else wants to go the same route with a Eheim canister filter just P.M. me.