well yesterday i bought a 10 gallon tank for 7.88 at Pet Saver and 2 bags of 5lb sand, mixed with a 2 lbs of gravel. I have 2 fiddler crabs and 1 red-clwed carb in the tank at the moment. MY question is what kind of fish/frogs/anything cna i put with crabs, the water is about an inch-2 inches higher than the gravel and there is a huge piece of wood in the tank also. I've hadthat wood since i was 6!!