What pump for bokakob double coil?

[fishhawk357]

I am in the process of building a bokakob mini still and am just about done with it. I only need to drill the thermometer hole and solder the 1/4 inch tube for it. I have, after 3 attempts, been able to make the double helix coil. My problem is that my pump wont pump enough water through the coil. It is just a pond pump. I need a pump that wont break the bank but still be able to pump at a decent rate. Anyone have any suggestions? Thanks in advance for any help.