We used the bromothymol blue for staining onion cells in order to see the nuclei. It worked great, and there's more than enough for more slide work and any other experiment that calls for it this year.
Bromothymol blue, 100 ml
We will be using this item for an Environmental Science Class
More accurate than litmus paper
My plants need a little acidic soil condition but my tap water is highly basic. I use Bromothymol blue to monitor the pH of my tap water after reconditioning. Comparing to the pH paper, the solution is much much more accurate.