Im very allergic (cats, dogs, birds, grass, dirt, dust, pollen, any type of melon, asparagus, cigarettes, deodorant, fish (eating them at least), coconut, pineapple, bee's, want me to go on because I can for at least 300 more characters...lol.) Im also an asthmatic who has never smoked a day in his life
Even with my allergies and asthma, Ive never had a problem with tap water conditioner. Ive used Tetra's brand as well as the API stuff. Never an issue. You probably caught a cold and it was coincidentally the same time you used the conditioner.
46 Gallon Bow F/W: 4 - Zebra Danio's, 2 - Red Platy's, 2 - lg. Silver Dollars, 1 - Pleco (4.5"), 1- Gourami, 1 - Cory Cat, 1 - mystery snail, 4 - Cherry Barbs, 1 - Black Molly