Transfering tanks.

[Lampshade]

I went from a 55 to a 155, But was lucky and had them in the same room. I filled my 155 and then ran a hose from old tank to new sump, and new tank to old sump. I had to adjust flows a couple times to keep them balanced, but let them transfer for a few hours basically doing a large water change on the old system, and hopefully seeding my new sand a little in the new system.

Did the transfer with little to no cycle(could read ammonia at all), then a month later added 50lbs of dry rock and nearly crashed my tank. Had it have been live rock I'm sure it would have worked out better. Careful with that.