After weeks of looking for less expensive alternatives for my hot tub, reading through countless reviews, I ended up giving this a try. This has impressed me. My hot tub holds about 270 gallons of water. Following the directions, give or take 1 ounce per treatment. For me a treatment normally holds good for around a week. I check my chemicals every 5 – 7 days. After around a month, my chemical balance has been more stable, no large swings anymore. No more dumping in what I considered a ton of chemicals. My water did NOT turn blue, as it stayed clear. In past, my PH always seem to drop, it no longer drops as much as before. The 1 ounce rating must be by weight, as 1 fluid ounce = 6 teaspoon. So I started with 1 teaspoon, it was over kill, but lasted a very long time (2 weeks) before getting back in line. Next about 1/2 teaspoon, and it seems to be pretty close. At that rate, this jug has enough to last me 3+ years! Before I would go through a container of this size in about 6 months. I have noting bad to say about this product except, where have you been in my hot tub’s life.
Well, after 2 months I came to a solution of how much chemical to put in hot tubs.
About 1 oz. by weight or 2 Table Spoons (per 250 gallons) every week for a usage of 2-4 times per week. This seems to hold out well for me. I can see if you use it more it will take more, same if you use it less. So to break this down better I made a chart.
For a usage of approximately 4 times per week.
150 gallons = 1 table spoon or 1/2 ounce (by weight)
250 gallons = 2 table spoons or 1 ounce (by weight)
400 gallons = 3-1/4 table spoons or 1.6 ounce (by weight)
700 gallons = 5-1/2 table spoons or 2.8 ounces (by weight)