Here
Now this doesn't remove the aforementioned chloramines or heavy metals, but for 67.50:
4 oz make a 1 g stock solution. 1 lb makes 4 g of stock solution. 50 lbs makes 200 g of stock solution.
1 drop treats 1 g of water
24 drops is 1 ml, and there are 37850 ml in a gallon. 908,400 drops in a gallon. So for 67.50, you can treat 181,680,000 g of water for chlorine. I think that's the cheapest way.
Sodium Thiosulfate is great stuff.
Now this doesn't remove the aforementioned chloramines or heavy metals, but for 67.50:
4 oz make a 1 g stock solution. 1 lb makes 4 g of stock solution. 50 lbs makes 200 g of stock solution.
1 drop treats 1 g of water
24 drops is 1 ml, and there are 37850 ml in a gallon. 908,400 drops in a gallon. So for 67.50, you can treat 181,680,000 g of water for chlorine. I think that's the cheapest way.
Sodium Thiosulfate is great stuff.