How to build a very simple calcium reactor to add calcium and alkalinity to a miniature reef tank.

[@tobiasdecker884]

Drop dead easy design! I may build one soon! Im sure the acrylic was pretty pricey. You could also easily add a PH probe and add a cheap PH controller wo it to get an idea of what is going on inside of it.

[@davidreeves644]

How many gallons per hour does the pump output?