03-19-2013, 12:23 AM
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If at all possible I suggest putting the new filter into the established tank for a few weeks to let it build up. Then move it over to the other tank. As long as you have some decent fast growing plants, the two together should handle jump starting the cycle.
Personally when I start up a new tank I clone it by placing a sponge ahead of time into one of the established tanks. When the new tank is ready to go I bring the sponge and sit it in a corner of the tank on the substrate. I also take substrate from an established tank and put it into the new one, mixing it in well with the new substrate. Add plants, and usually I am able to add some fish right away. These are some options for you.
That said, an Aquaclear is pretty big with it's media area. If you can squeeze in media that goes into the new filter into the Aquaclear 70, you could let it stay there for a few weeks then bring it over to filter of the new tank.
Last edited by Sanguinefox; 03-19-2013 at 12:26 AM..