Nitrate test kit

[moosehead]

I use the pro, don't test mag or cal to much so that one doesn't bother me a like there Kh it's nice and easy and do it around every 5 days. Used to use salifert Ca but then one of there kits was testing around 500 and I double checked with 2 other kits and they showed 420 so no more salifert CA for me. Bought the 3 in one red sea pro.