Tunze Osmolator Universal 3155 ato

[mike007]

Will this ato work on a tank that has a rim?

 

[Tphill]

I'm hooking one up to a 29g QT now. Having no issues. I have one on a 38G sump under my 75G tank, another on a 55G sump under a 100G tank, and have another to go on a 40G sump under a 120G.