Sumps work by having water drain down from the main aquarium via a weir and overflow section and into the sump. The water then passes through the filtration in the sump before being pumped back up to the main aquarium. … It then drains into the sump and is then pumped back to the main aquarium.

How does a sump reef tank work?

Sumps work by having water drain down from the main aquarium via a weir and overflow section and into the sump. The water then passes through the filtration in the sump before being pumped back up to the main aquarium. … It then drains into the sump and is then pumped back to the main aquarium.

Does a reef tank need a sump?

So, are aquarium sumps necessary for a saltwater fish tank? The answer is no, sumps are not an absolute necessity for a saltwater fish tank. There are many aquariums that are very beautiful and thriving without sumps integrated into their reef aquarium setup.