Filtration questions

temporarily? is this a nano tank or smaller tank, I guess I am confused as to what you need a temp filter for

a sump is simply for more water mass and getting the heater and equipment out of a tank...they also house refugiums for microalgae
 
The best filtration will be your live rock and sand, and good water movement. It can be a temporary filtration that turns into a long term filtration, and back into temporarily.
 
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