Crystal Clear Dry Vanish Dechlorinator - 2 lbs.

Not a fan. I have always used liquid De-clorinator but I just got this crystal type in and when you mix it with water from the Koi pond before you put it in, it clumps and it is very hard to get it to dissolve and lots of stuff at the bottom on the jar that looks like plastic so you have to strain it before you put it in.