My only comment regarding adding a drink mix is to wait until the contact time has passed. With iodine treatments at least, it's my understanding that the drink mix will keep the solution from doing it's job. I don't know if it's the same with a chlorine based product but there's no use taking a chance since you have to wait to drink the treated water anyway.

That's all for now. Take care and until next time...be well.

snapper