Bio Filter questions

[xeonic]

I'm not sure there is a solution unless you keep the substrate soaked in water. I don't think I want a muddy bedding for my frogs. A setup like Heatheranne's is probably the best option to go this route.

[michael novy]

I agree as well. Buying the bacteria is not necessary. All you need is porous rocks such as hydroton by the pump(in the land area) or have the water run over rocks such as sand stone. This is where your bacteria will grow. Porous surface and oxygenated water is all you need to start. Adding the frogs will start the culture once they deficate or urinate in the water.