Given the wide variety of water treatments and additives that claim to do everything from remove ammonia to kill snails, I would not use tank water for certain crops (like the ones on the first list I posted) unless I knew for sure that the water does not contain any of those things. Besides, I think most bottles have warnings saying something along the lines of 'do not use on fish intended for human consumption'. Just like equine dewormers say 'do not use in horses intended for human consumption'. In other words, ingesting this even indirectly is not a good idea.
I would have no problem using my personal tank water for everything, as I don't use any water conditioner, aquarium salt or medications. I'm sure not everyone can say the same, which is not a bad thing - just something to be aware of before watering your vegetables or fruit.
I would have no problem using my personal tank water for everything, as I don't use any water conditioner, aquarium salt or medications. I'm sure not everyone can say the same, which is not a bad thing - just something to be aware of before watering your vegetables or fruit.