N/P Reducing Pellets ("Solid Vodka") - "Wow" ... 3 month update

[Delphinus]

I think I have both Elos and Salifert for nitrate but it's been some time since I used them. Unless it's a really low reading I usually have a really hard time with colour comparisons and there's a lot of guesswork involved. It's like you say, I end up just using them to spot trends rather than establish an actual number.