DIY auto-topoff

[rhofmann]

I know there are a few different ways to DIY an auto-topoff. I have a 40G DT and a 20G sump, with pretty limited space. Any opinions on the best way to go with this project? I'd like to keep all the equipment inside the sump cabinet below the DT if at all possible.

[nikecivic]

Are you using a controller? If so, just add a float switch module.

If not, try autotopoff.com/ or use a JBJ top off unit.