They overdosed is my guess. The woman reported they each took "a spoonful" in soda. A teaspoon is 4 grams. An overdose is 2 grams. I don't know why this isn't reported anywhere.

It was probably the right chemical, as far as I can tell there isn't an aquarium specific formulation, Chloroquine Phosphate is Chloroquine Phosphate. You could just as easily overdose on the prescription if you downed a handful of pills.

I'm upset they didn't report this correctly because now people can still die from an overdose and people who might have had access to the aquarium chemical might have saved themselves with proper dosage.