Salifert vs elos test kit

[Ericsnyder]

Ok l have been having problems with my calcium:
My levels NEVER dropped always used salifert alway got 450-460

Now I just got an Elos calcium test kit and my reading is 370 ???? WHAT!!!!

I'm thinking Elos is right cause my tank is packed with corals lots of LPS and SPS

Which should I trust?? I just don't see how I shouldn't be dosing calcium with the amount of corals in my tank

[nlgill13]

Sounds like your Salifert test kit might be expired.

take a water sample to your LFS and have them test it for comparison.

[disc1]

Ok l have been having problems with my calcium:
My levels NEVER dropped always used salifert alway got 450-460

Now I just got an Elos calcium test kit and my reading is 370 ???? WHAT!!!!

I'm thinking Elos is right cause my tank is packed with corals lots of LPS and SPS

Which should I trust?? I just don't see how I shouldn't be dosing calcium with the amount of corals in my tank

Get a solution with a known calcium level and see which kit reads right.

[Ericsnyder]

Get a solution with a known calcium level and see which kit reads right.

Any suggestions on what I could use as a liquid with known calcium levels

[vitz]

have you tried googling 'calcium reference solution' ? ;)