Just got bubble magus Dosing, alk,cal,mag and I love it. It's supper easy to understand and set up.
The Aquahouse one doesn't need a timer, so they come out way less than $100/pump. I was trying to find the ones BRS has but can't find any stock anywhere. Those need timers. The Bubble Magus looks elegant. I think I'm going to go cheap. I hope that doesn't mean they will wear out fast.
Big whorls have little whorls, Which feed on their velocity;
And little whorls have lesser whorls, And so on to viscosity
Lewis Richardson in 1922
Currently I am dosing about 100 ml corals look happy