Hi
This has been available for a long time now.
The best way to achieve this is with the dosing pump assy, you can also acheive this with pumps programmed using the ATO software built into the ProfiLux control.
Drop me an email at
sales@aqua-digital.com we are the North American/CAD distributors and can guide you further.
Best wishes
Aqua Digital Inc
GHL ProfiLux Official Distributors
"Support is never far away"
sales@aqua-digital.com
http://retailer.aqua-digital.com