Weird question: Food coloring and syphon.
Had an odd question for you. I'm using the Foliage Pro with a Dramm syphon mixer for all my gritty pots. It's a little hard to see though if the syphon is working properly so I was considering adding some red food coloring dye to the FP/water mix to help me visually see if it was mixing correctly.
So, does anyone see any harm in this? Below are photographs of the product and ingredients. I figured if we can eat it, it's probably safe for my plants but what do I know.