As Ryan discussed, sorry; but your planned set-up is not going to work . A goldfish gets huge and won't fit in a 10 gallon for long; much less a partitioned shallow area of it. They carry parasites that can get your frog sick. Playing around with different fishes/frogs will bring you to similar non-working set-ups since a 10G tank is just too small to pull that off. If built correctly, can keep FBT by themselves .