If your new/source water has chlorine you need to use a dechlorinator. We use and sell Ultimate Water conditioner which is an ammonia binder as well as a dechlorinator. You use the same dose for ammonia binding as you do for neutralizing chlorine. PLEASE NOTE. The new water HAS TO BE DECHLORINATED BEFORE YOU ADD TO POND OR TANK You need to read this article; https://hanoverkoifarms.com/water-changes-additions/. In the future please do not post questions here on Google. Instead use email to sales @hanoverkoifarms.com
Yes. Depends on how strong the blocker is and how much chlorine you already have in your eater. If you have well water, you don't need a blocker
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