Quote Originally Posted by Waterlogged View Post
Don't bother, if you have a Petsmart (or some other pet store that sells fish supplies), get a 8oz bottle of this.

http://www.petsmart.com/product/inde...ductId=2754906

Use 2 drops max per loop on first fill, refresh with 1 drop about every 6 months. I've been using it for a while and haven't had any problems.
Thanks, I bought some today at Petsmart and I will use two drops for the one quart of fluid in my loops.