Are there freshwater calcium tests?

[karanit]

I had heard there were only saltwater calcium tests so I was surprised to see these couple for sale saying they're for freshwater/low salinity. Can anyone speak to whether they're accurate or worthwhile?

Fluval - https://www.amazon.com/Fluval-Calcium-Aquarium-Freshwater-Saltwater/dp/B092XFXDCC/ref=sr_1_1

Monitor brand - https://www.amazon.com/Monitor-Calcium-Magnesium-Salinity-Tests/dp/B096V9J9JP/ref=sr_1_4_sspa

[MWilk]

I use the API calcium test, the instructions have to be modified to make it more accurate. The only reason it’s labeled as a saltwater test is that the accuracy is in 20ppm increments, we don’t have that much calcium in our tanks normally. 

Both of these tests have the same problem. 

 

[karanit]

On 9/27/2024 at 7:49 AM, MWilk said:

I use the API calcium test, the instructions have to be modified to make it more accurate. The only reason it’s labeled as a saltwater test is that the accuracy is in 20ppm increments, we don’t have that much calcium in our tanks normally. 

Both of these tests have the same problem.

If I'm reading my city's water quality report correctly, I have 100 ppm calcium hardness. In my case then test might actually be useful because I'm in the higher range?

[MattyM]

Here's what I've used, I believe got it from one of Irene's Co-op videos: https://www.amazon.com/gp/product/B0002568F4/

[MWilk]

On 9/27/2024 at 10:58 AM, karanit said:

If I'm reading my city's water quality report correctly, I have 100 ppm calcium hardness. In my case then test might actually be useful because I'm in the higher range?

In that case I would ask, why bother testing it at all? Curiosity?

[karanit]

I am not sure I am reading the report correctly.