Hi. I have a 5 g and a 10 g planted tank, 1 betta in each tank, both newly cycled (readings of 0 0 20 ish about 9 days ago. I'm using the API Freshwater Master kit and I shake bottle 2 for the full 30 seconds and the sample for a full minute. I've done a reading on each tank every day for a week - I'm pretty sure there's nothing wrong with the kit. I had some of those strips and tried them just in case, but both tanks register no nitrates at all on those. The readings have been at 0 0 5 for over a week, which sort of surprised me but maybe it's the plants? My question is: Will it hurt anything if I do a PWC on a nitrate reading of 5? Or should I just leave it alone? Thoughts?