Using Aquarium Water for Watering Orchids

[Becca]

Hi Everyone!

So I gave a friend a couple of phals....to get her addicted , which won't be hard since she already has fish and turtles and loves plants! We were wondering if it is okay to water the orchids with water from her aquarium. I asked her what chemicals she adds to the water and she said she uses something called Stress Coat by API, which is a water conditioner. Would this water conditioner be similar to what is used in a home water softener system or is it completely different? Well if someone can help us determine if it is safe it would be much appreciated....the bottle didn't really say what exactly was in it. The next choice of water is regular city water.

Thanks in advanced for any help given!