Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Best of the Best

This stuff is PERFECT for those with larger tanks. It treats much more water with much smaller doses. I have a 125g and have to use 2.5 cap fulls to treat my tank with water changes. With other products you are looking at way more per treatment, therefore having to buy more of it to treat more water. This is the best stuff around for De-chlorinating water in any size tank.