Backyard Aquaponics
A place to discuss aquaponics

No it ejectes, meaning pumps out 6 gallon for every one gallon used (from the hose)

It does pump 6 for every 1 according to the manufacturers website:
http://www.gtwaterproducts.com/easy.php
However, the energy to do that comes from the high pressure hose, to shift a greater volume of water to a much lower head, ie pressure. There is a lot of energy lost due to friction and no doubt some due to noise, so it wont be all that efficient if you took the time to measure it.
There is no high pressure water/energy source in an AP system, so it is not going to shift anything like 6 times the volume of water used, and you cant keep adding water, as you will overflow the system, so unless you are going to drive it with an electric pump that recirculates the water, it just will not function... and if you are going to need a pump to make it work, it becomes entirely superfluous- it just isn't required, and can perform no useful function in a small AP system.

Any time it looks like you've beaten basic physics, assume you've made a critical mistake somewhere.

Yeah such is life

Just use good design principles.

no large high differences, over size the pipes, keep it simple.