[Ben]

I use Instant Ocean for all my testing needs. Today I decided I should start testing for strontium, iodine/iodide, and magnesium. IO doesn't have test kits for those elements. What do you prefer? Reasons?

 

[Reefing Madness]

API. No reason, been using it forever.

 

[angelsdice159]

Red Sea., For Magnisium, Calcium, Alk, Strontium
Api For The Rest.
My Reason,; Is Red Sea. Gave Me Better Readings
Then The Api Did

 

[SantaMonica]

If it helps, I mostly only test SW, and use Salifert (except for phosphate now, which I use the Hanna digital).

But I've gotten to where I can tell just by looking at the tank, so testing is getting more rare.