Implications Of Very Soft Water?

[waterdrop]

Yes, its a huge thing to have the safety factor of knowing that should you need to do an emergency water change, the tap water coming in has the same hardness characteristics as the water that's in the tank, basically. There's a good argument for being very stubborn about watching how things go with your tank as an un-doctored setup. The idea that your fish may be harmed by fluctuating water characteristics due to super-low KH does not always turn out to be reality if you watch the tank for a couple years.

WD