They all apear fine to me, except the ten-gallon. Gravel is a no-no when keeping most frogs and the only frogs that can be keep in tank with it are totally aquatic species such as Xenopus, Pipa, and so on. The reason being, non-aquatics have the potential of swallowing it and having a gastrointestinal impaction, which can lead to death.
Also that gravel is way too think and will only serve as a breeding ground for bacteria.