How do I cycle water between 2 tanks?

[Josh708]

how do I go about cycling water from aquarium a. to aquarium b. then back to aquarium a. creating a never ending flow of the same water between the two aquariums?

[RichBowyer]

Sounds like twice the dead fish should something go wrong...........but since you asked,

They should be level to one another, Use a small capacity pump (with adjustable discharge valve) to pump from "a" to "b". Have a flooded connection pipe of twice the diameter of your pump discharge to allow water to siphon from "b" to "a".

You could actually adapt a filter to do act as your pump.

[Josh708]

That sounds expensive I just found this and wow! I'm going to do this instead.

http://www.bio-elite.com/waterbridge.htm

Fish can go from tank to tank soo cool!