This kit costs roughly $10-20(will re-edit update when I have an exact price) and it is quite simple to use. You just have to match the colors and you MUST read the instructions because the colors can be confusing with the tests. There is a key chart demonstrating which color matches what nutrient and green is for pH. Any questions, tips or suggestions for another video? Feel free to comment below.
![](https://s2.save4k.org/pic/wFSvgLlbYfQ/maxresdefault.jpg)