These are what I use most of the time, and yeah it turns out I was reading it at 5ppm, not 0.25ppm. I think its because most of the time I'll be testing for ammonia, and I am used to the second color level being 0.25. But thanks so much for the help though! I think I will buy a nitrate based fertilizer from my local(not so local) reef shop this weekend to get those numbers a bit higher before trying again.Sounds good, and take a photo of the kit and test card showing nitrates. It will help
Edit we don't need you to retest, just photos of the kit and card