UltraZap koi underdrain parts — the underdrain hub and the matching koi fingers — set up a self-cleaning underdrain in a koi pond or fish-tank base. Water passes up through the base and carries fine solids with it, instead of letting them settle where you have to vacuum them out. It’s the standard build for serious koi setups and aquaculture tanks, and suits aquarium-style systems plumbed with a bottom drain.

Good to know:
– Underdrain hub
– Koi fingers — the screens that fit the hub
– Builds a self-cleaning underdrain in a pond base
– Suits koi ponds and aquaculture or fish-tank setups