Best Reef Magnesium Test Kit?

[Paulm7373]

Is it better to have the Hanna high range checker or will low range be more than sufficient?

[Gregcoyote]

If your testing in the high range, your fish are probably dead. You are looking for the low range test. 0.00ppm

[Paulm7373]

Ok got it. So what is an 'acceptable' maximum phosphate level for a reef tank?

[Gregcoyote]

For hard corals it is under 0.1ppm, preferably 0.05ppm. Natural reef water is about 0.007ppm, but in a closed system that's probably too low and could starve out the corals. Fish can take a lot more, but it can create a lot of algae if numbers get much higher than 0.05ppm.

[Paulm7373]

I've decided to go with Red Sea for the magnesium test kit because it contains a titrator which makes the adding of the reagent drops and swirling / mixing much simpler, there are also enough for 100 tests compared to 50 with Salifert, and it also comes in a nice black plastic case compared to Salifert which is in a cardboard box and more prone to water damage.