I just went from a 55 to a 135. I set up a water transfer with my 2 tanks at a slow rate for a day, with new tank draining into old sump, and vise versa. I had new sand in the new tank, and wanted to acclimitise everything before the transfer. I moved everything over in about 2 hours, left the old tank setup just in case i needed to move some stuff back.
I showed 0 ammonia and nitrites through the whole thing, i tested every 2 hours for that day, and the next 3-4 days 3+ times a day.
My coral and everything transfered great, everything was open within hours and looking better than ever. I had a pretty light fish load, but none of them where affected it seemed, just more room to move around.
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