If I get a 90 gallon long and make my 30 gallon a sump, can I just leave my 30 gallon as it is, cycle the 90 gallon, connect them, and move everything to the 90 gallon? When I say leave it as it is, I mean take the fish/inverts out and leave the sand and LR. Can it just be one big area for equipmeant and a refugium or does it have to be seperated? And in a refugium is where macro algae it put?