best test kits for Ca and Mg?

[Ron99]

As the title says what do people recommend as the most accurate test kits for Ca and Mg?

I have an Elos Mg kit that is giving me a reading of somewhere around 1050 for Mg in a freshly mixed batch of D&D H20cean salt at a SG of 1.025 and temp of about 78. That seems a bit low as I thought this salt should be higher.

[tlo]

I use salifert for both and I am happy with them.

[Lance]

I use Salifert and Elos, but IMO they all suck.

[leducreef]

i like the api tests

[Myka]

I use Salifert and Elos, but IMO they all suck.

Ditto. Although I have been putting more faith in Elos kits lately.

I wouldn't be surprised if your magnesium is 1050 ppm out of the D-D bucket.

[Tom R]

I use Salifert for both and I am happy with them.

I have used the Elos test kits as that is all J&L sells, however the last couple of test kits the fluids ran out rather prematurely and I only got about 30 tests per kit. I then switched to Salifert from OA.

Tom R

[Delphinus]

around 1050 for Mg in a freshly mixed batch of D&D H20cean salt at a SG of 1.025 and temp of about 78. That seems a bit low as I thought this salt should be higher.

Sounds about right. I gave up on the premium salts for this very reason. I got the same reading for D-D myself.

IMO Elos and Salifert are about the best bets for Mg. But as stated already, all test kits generally have their own pitfalls.

[Ron99]

Okay, sounds like it is the salt and not the test kit that is off. I thought the H2Ocean was supposed to have Mg around 1300 :cry: I guess not. Probably time to buy some bulk supplements and switch to IO when this bucket is done.