I have never done anything like this so I decided I would try small with a 20 gallon long. With a set up for like 3 fire bellied toads. I understand how the false bottom works and how to set up a pool of water and where to set up the waterfall, but my question is, if the waterfall is not directly behind the pool, like you create a mini stream where do you put the intake so the waterfall can get water up from the pond? Also I would like to have a small filter for the pool to help clean the toxins of the fire bellies. I know I will have to do partial water changes, but I was thinking this could be helpful. Thanks a ton for any help. I have been watching videos and reading through threads on building but some how I keep missing this step it seems.