I would definetly keep the 20 gallon up long enough to see what is going to happen. In case you need to swap them quickly. I couldn't tell you for sure what will happen. I figure the maroons will come up on top if SHTF
38 gal SW
, 40lbs base rock, 5lbs live, emporer 280, bio-wheel 330,tronic heater, 2 O. clowns, 1 firefish.
29 gal FW
, boring...soon to be salt I think.
10 gal SW
, 20lbs LS
, 20lbs base rock, 1 unhappy domino damsel (he was in the 38...switched the percs and the damesel recently).