before everyone gets bent out of shape... I am willing to consider 1 frog but going up to a bigger tank is out of the question. Yes there will be hiding places and the lighting will be adressed. I plan to have this set up and running without a frog so that I can work out kinks. As to the waterfall, I really think it can be done in a way that does not take too much room plus it keeps the water from laying stagnant. The clay balls are there as part of the water filtration. I started by building the false bottom and learned of why the clay balls are needed after. I don't think I will ever post a picture because you people will all nit pick it to death.