I have a 55 gallon holding a baby LMB and a yellow bullhead. I want to drop the water level and move my American Bullfrog from his current 10 gallon setup into the 55. Any ideas for a platform besides stacking rocks? I have an infinite supply of creek rocks, but I'm tired of wasting all that swimming space. I also have a lot of driftwood available, but how can I get it to stay halfway out of the water without stacking rocks under it?