Exo Terra waterfall in small to large. They work with a small pump that sits in the base of the assembly and pumps water to the top through a small hose that then runs down the face of the waterfall into the reservoir at the bottom where the pump sits. The medium and large versions aslo have a small reservoir half way down to take an optional fogger.
A few problems we have found using these Exo Terra waterfalls in our display vivs. include the reservoir running low through evaporation and the pump being very intolerant of running dry (they burn out quite quickly if the go dry), blockage of the pump from substrate or dead crickets etc. and the just awkwardness of the assembly to clean out leading to the water being left a little too long and going off. It really is just too much work to do every couple of days, especially if you have the Exo Terra waterfall in amongst a complex display viv.
A cheap, easy to install improvement can be made that drastically reduces the amount of cleaning required, improves the amount of water flow (the Exo Terra waterfall pump itself generates quite a low flow) without causing splashing all over the viv. and improves the quality of the water.
We replace the Exo Terra waterfall pump with a Superfish Aqua 50 filter pump. It is larger overall but still fits neatly into the reservoir or the Exo Terra water fall. It has a higher flow rate than the Exo Terra waterfall pump and has an very efficient cartridge filter. This will clean out and solids from the water in the Exo Terra waterfall and will allow nitrosomonas and nitrobacter bacteria to grow in the filter membrane which will remove ammonia and nitrate (products of biological breakdown of waste) and keep the water clean and fresh for much longer, reducing the frequency of cleaning and improving the quality of the water available to your reptile to drink (we typically use them with chameleons, tokays, etc.). The pump in the Superfish Aqua 50 also has a higher tolerance to running dry than the Exo Terra waterfall pump (although this still is not to be recommended) and has an easy to change and inexpensive cartridge filter.
If you have and Exo Terra waterfall it is well worth giving this small improvement a go. Save yourself some work and improve the environment of your animal for very little cost.
The Angell Pets Team