i can agree with you, everyone does have a different understanding of toxic. thanks for staying civil about this, appreciate it.
i think that phup/down reagents are toxic becuse of how easy it is to mess up with them. i feel as if it's very unneccsary to have to go thru the hasle of putting in specifically 24 drops of the stuff, just to get it where you want it to be, even then it's not accurate because it doesnt mix around the gallon very evenly.
would you rather have to go through the hassle of phing? or be able to fill up some gallons of water, water your plants, then call it a night.
my last grow, i had some bad experience with ph. it caused me to lockout, and i wasn't able to get it out of lockout without gypsum. here's a pic of what it looked like.
what i meant by toxic, i meant that it's really easy to mess up, like how a human can be toxic to society and cause problems, i think that's how ph reagents are toxic to the hotriculture community.
hope i gave you a better understanding.