calcium test kit

[mark]

Originally Posted by JOEL

wow that means that I read 0.7 on the syringe so I only have 150ppm of calcium? It is new ro with io salt with no live stock just water and live rock. The calcium level on instant ocean salt is very low

If you're doing the low res, the 150 could be right (150x2=300ppm). I've found IO can be low, see here.

[kwirky]

i never liked using the "low res" version of the salifert calcium because of the "low res" nature of it. You get so many tests out of it anyways.