Posted: 14/09/2014 at 22:36
Does the sphere have just a hole bored in it or is there some sort of connection at the bottom? If the former, you need to seal the end of the hose from the pump into the hole at the bottom so water can only come out of the top. I would have thought it would have a kind of bung for that. If the latter, can you take a photo of the connection?
I'm assuming it is a low-power pump which is submerged in a sump below the ball and only has enough power so that water runs gently out of the hole at the top and down the outside of the sphere. If it is meant to shoot water up to some height out of the top of the sphere, it won't need to be sealed at the bottom and you can just shove the hose up the hole so it is a few inches below the hole at the top.