04-26-2012, 09:24 PM
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There are some substances listed on that chart that I have never heard of. The often-mentioned adage that if it is safe for humans to drink it is fine for fish doesn't really hold up.
I had this discussion a few years back on a UK group and the consensus then was that most water supplies in the UK go light on chlorine, unlike North America. Chloramine is becoming more common in NA and as ladayen said this is another matter again.
Simon, you might want to talk with other aquarists in your area. If they have no issues, and you have no issues, not using a conditioner, fine.
But i fell into this trap once, many years ago, when I lived in Victoria, BC which then used very little chlorine. None of us used conditioners. Then one summer, the chlorine was increased due to a bacteria in the reservoir, and none of us knew. Many dead fish after the weekly water change that time. I decided it wasn't worth the risk.
But I only use, or suggest using, a conditioner that only targets what needs targeting in your water. I will not use Prime myself because i do not want more chemicals messing with the ammonia, nitrite and nitrate. I have plants for this.