Reading Salifert is hard. I'm told so are the other reef hobbyiest kits. Has anyone used this?
http://www.promagenviro.com/Copper-Test-Kit-EC-20-R
Instructions say it's good from 0.00 to 0.5 ppm.
http://www.promagenviro.com/Copper-Test-Kit-EC-20-R
Instructions say it's good from 0.00 to 0.5 ppm.