Quote Originally Posted by Vinas View Post
I'd go PT Nuke as the silver kill coil doesn't work that good. I've seen several people with algae buildup in their loops when the kill coil should have prevented this.
This is because the growth had a chance to start before the silver was in a strong enough concentration in the water. If the user drops the silver into a jug of water a few weeks prior to the build being filled, the odds of this happening are drastically reduced. Another option is to use PT Nuke or an aquarium algaecide on first fill only and let the silver take over after that.