You can also just buy a pump from a place like Grainger and build the unit yourself. The end cost was only 1/3 to 1/2 what you'd pay for a prebuilt system so it saved me many $$$. You can put the unit inside a simple wooden shed the size of a medium dog house. Just provide some plumbing and ventilation. If you look into catalogs like those available from Aquatic Ecosystems they have all the poop on how to size a pump and which pump type to choose. They have enough pictures of the equipment that you can see exactly what you need for all the plumbing.
