ATO for a 5.5

[WilliamH2529]

Hey guys I have a 5.5 pico tank, it’s mostly a macroalgae tank with just 1 or two coral, I’m wondering if anyone knows of a good ATO that won’t be big and bulky for the tank and would work good for a tank that small?

 

[Ron Reefman]

I use the one Reef Breeders sells in my 16g tank. I fill rodi from from a 2g bottle in the stand. The eye for water level is quite small.

 

[SuperDave531]

I built my own for my 40oz out of a dosing container. Something similar might work for you My friend at pnw-customs.com sells ATOs for pico tanks

 

[GobyGuy]

Gravity based one is your best budget bet. Tried and true