Help? problem with testing kit
I have just set up my new tank and bought a "Hagen" KH/GH testing kit.So the GH level of the water is 340 , which is very hard. Whereas the KH level is 30mg , and the ph is 6.8. Since the water is quite hard , I was just wondering wheter it is suitable for planting aquatic plants n keeping neons. And another thing , as I saw a web site showing CO2 chart with the KH level in degrees, but my tested result is 30 mg according to the manual in the kit. Hence , does any one know what is the meaning of 30 mg in the sense of degrees?