you would best be served wrapping the pump housing to prevent debris from clogging the pump. i have used that pump, and i will say this, they clog VERY easily.

IRT beneficial bacteria: would it surprise you folk to know that vivaria house a layer of both nitrifying AND denitrifying bactering in it, just as an aquarium does. well it is true. they are a slightly different bacteria, but do the exact same job. in fact, ALL soils, whether it be in your vivaria or your garden, contain these beneficial bacteria. the nitrogen cycle surrounds us everywhere my friends!!!