Nitrate levels...

[Rocky998]

I almost want to get one of those machines they use at the hardware store to shake the paint can.

LOL I thought the same

 

[Fishmanic]

I use API test kit to test for ph, ammonia, and nitrite. I use Salifert test for nitrate...it is so much easier to use and to read the results. It can read nitrates to as low as .2 ppm and as high as 100 ppm. And no shaking required.
https://www.amazon.com/dp/B001KPR46M/?tag=ff0d01-20