Many of us have monster tanks and or like myself many tanks. I am well aware of low to no cost food for my fish but what about chemicals. Like dechlorinators and such. What do you use and where do you get it. I have looked around and found this http://cgi.ebay.com/Pond-Dechlorina...=39:1|66:4|65:1|240:1318&_trksid=p3286.c0.m14 you get enough to make up dechlorinator for 30,000 gallons of water for under 15 bucks. It sounds like a monster deal or is it? If not what do you use and why.