Thanks bro you are dead on correct. What I am doing actually is the outlet from my maxi jet 1200 is the same size as the tubing that I had left over from me eheim (Snug fit) And my other 5/8 tubing fit perfectly on the inlet. I plan to drain my tank with a python then fill a trash can near the tank with the tap water and let it dechlorinate and match the temps up just right and use the powerhead to pump the water in the tank. In doing this I hope to eliminate fish stress due to chlorine exposure.DragonScales;3297709; said:Take your Eheim intake outlet to your fish store. They should be able to match it up to a hose that will fit snug tight. Make sure it fits snug tight or else it'll leak. I use metal clamps to make the fitting even tighter. It should not be more than $2.50 a foot. I had the same problem trying to figure out Eheim hose size then realize they do not use american standard size.
Seriously though, you must have did somthing wrong on the pump setup. My 125gph powerhead can push way more than 2 feet.