Guys any idea how the works it is said to provide up to 100 dkh and is very simple to use no Ph probe etc and custom made in Belgium alot of large aquariums use it and it not only maintains optimum Ca but kh as well!!
"There is a reactor from Belgium that can push 100dKH and only uses a single dial to control the tank kH/ Ca. No pH probes etc etc..... it's so simple with much less to go wrong than a standard ca reactor. Many many large European tanks are using this reactor and ALL rave about it. It keeps tank parameters very stable in larger systems.
It's called a DaStaCo Extreme 3 Calcium reactor..."

some more info on it in the following links
Vin's Reef Pics - Page 5 - UltimateReef.com
Calcium Reactors
This is the inventors site use google translate to read it if you cant read flemish
Desert's Ocean