you are gonna have to buy more rock. you should have about 180 pounds or more in the 180 reef, and probably at least 90 pounds in the 90 FOWLR. you will have small cycles in both tanks, and you should not take the bioballs out now or all at one time later. move things around, and wait for everything to settle in. once they do, take out the bioballs a little at a time and replace them with liverock rubble.