coralvue dosers. Each one has a micro computer control and can be chained. I got three of them for my cube which will never be setup LOL. If you go that route I have a place for great deals.
I want a tunze 3155, but got a used autotopoff.com for 25 shipped. Double sensor with and extra bracket. Something to play with. Looking at mixing kalk into the ato and still gravity drip the 2 part.
Been researching marine color doser. It's probably an oversea copy of the bubble Magnus, i think.
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