Seachem Calcium versus API Calcium test?
 

Anyone have experience with both of these tests?

I've been using the API test for six months. My Calcium has routinely been testing weirdly high (500+). I figured it was due to not rolling my salt bucket well enough.

I just used the Seachem Cacium test for the first time. I didn't believe the number, so I tested again. 300 ppm.

The test is new, not expired, and Seachem just sent me a new reagent 2 (first one was rock hard).

I'm at a bit of a loss. Which test is more trustworthy?

Seachem is definately the better quality product.

Can you bring your test kits over to a friends place locally to test against their kit and water parameters?

I'm out of the API test. The Seachem one was 1/2 price at a local shop, so I figured I'd try it instead of the API one.

I can certainly get a second opinion on my calcium level, and find other water to test.

Never had any luck with the API kit for the same reasons you describe, always read artificially high by at least 100-200ppm. Tried 2 API kits and both had the same issue.