Yeah it sounds like you did it right, although I add enough titrant to the syringe to get it up to 1.0 cc
. Makes figuring out the Ca
level a little easier.
It could be that low for a few reasons but lets start with a few questions. Do you have any animals (inverts, corals, coralline algae, etc...) that would put a drain on your Ca
level? What kind of salt do you use and how long has it been since your last water change? Do you drip any kind of CA
additive to the water like Kalkwasser? I assume not, but just want to be sure.
You also need to check the Alk
to see what that value is. With calcium in that area, your Alk
may be low as well.
, make sure you run the test again. I always like to double check. If you feel the test is in doubt, use the reference that came with the kit to check its accuracy. I believe the reference is at a calcium level of 400 ppm
. Perform the test with that and see if it does in fact come out to 400 ppm