WTB: Dry Rock, Nano ATO (any brand)

[Jasontkd]

I am looking for Dry rock like Marco Rocks; around 20 pounds or so, and some sort of nano auto top off. I like the units with the optical sensor versus a float switch, but I am open to about anything as long as it is small. It is going in a 20 gallon Waterbox cube, so I don't have a lot of space.

 

[ReefsOnTheFarm]

$65