NZero Engineering - Hydroponics - link re-direction:

Bluelab Limited, formerly NZ Hydroponics International, now have their own web sites...

including the famous Truncheon EC Conductivity stick nutrient strength meter:
GetBluelab.com

Sound advice for Commercial Growers:
BluelabAssist.com

NZero Engineering and Gruebner Electronic Remedies are proud that our engineering and chip programming plays a significant part in Bluelab products.

Last updated: 2005 March 01
http://www.nzero.co.nz/hydropon/index.htm