seachem Ca test accurate ???

[rhino2099]

Hi all

I live in Australia near Manly in Sydney and recently set up a pump to collect fresh NSW for the first time (used to buy it) and found the Ca level was only 340ppm with my new Seachem reef status test kit . Someone on RTAW said they remember reading an article on RC about how someone tested a lot of Ca tests and found the saechem to bo about 50ppm below normal sea water levels (approx 340 ) which is what I found, so if anyone can rember this thread and could show me a link to it that would be great
CHEERS:)

[atty]

sydney waters have a lower CA than the coral reefs. i brought the complete package frome sera and i find them great but they do take a little long.

[Steven Pro]

The nice thing about the Seachem calcium test kit is it has a reference sample. Are you getting an accurate reading when you test that sample?