I have been thinking about getting an auto top off system for my 56 gallon tank. The reason being,
1) going away on vacation and don't want to rely on friends/family to come in every day or two to top off water in tank.
2) like the idea of adding automation to my system (having timers for my lighting, CO2, circulation pump still impresses me)
My tank is rimless/open top and I go through a fair bit of evaporation.
I thought about glass tops for it but not really wanting to go that route especially with pendant lighting.
I am thinking about getting the Tunze nano osmolator. thoughts?
The tunze is a very reliable system and works well. It is used by reefers extensively. I am not sure how you would mount it on your tank though. Even if it is mounted at the very top of the aquarium you will need to lower the water level to be an inch or two lower than usual for it to work.
You can also look at autotopoff.com ATO's, they are reliable and I have had one working on my reef for over two years without issues. (You will need the ATO + a pump -> Tom's aqualifter.)