An Auto Top Off container is perfect for holding a fixed amount of top off water. An appropriately sized ATO reservoir would be able to supply your tanks ATO needs for a few days if not weeks, while not being too large to cause a big salinity swing or flood the sump if the top off pump were to get stuck on.

Most auto top off units will come with a pump that will need to be in the reservoir to pump water to the aquarium.  The Trigger ATO units come with a super wide opening to allow a pump to be placed in the reservoir while having small 0.25” holes for the tubing to be routed.

Crystal 5 – 6” long x 14” wide x 15” tall

Crystal 10 – 10” long x 16” wide x 15” tall

Ruby 5 – 6” long x 14” wide x 15” tall

Ruby 10 – 10” long x 16” wide x 15” tall

Emerald 5 – 6” long x 14” wide x 15” tall

Emerald 10 – 10” long x 16” wide x 15” tall