Maybe I better get an opinion before I proceed with this idea.
The doser on the shelf will be used for fresh water for the ATO. Problem is that it can't easily be removed.
My idea is to cut a hole in the top and have a "fill" hole. Since the top will have 6" of ledge on each side, this will work. I could find a hollow ceramic fish or something that can sit on top of the fill hole and cover it.
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150 gal Custom. Born 5/7/07. 50gal, 29gal, 20gal Sumps. 30gal Frag Tank. ETSS 800 Skimmer, Deltec APF600 Skimmer. PFO Solaris Lighting on Display and Frag Tank
My Tank Thread