The bottles are labeled 10%.
You buy the box for $9.98. There are 3 bottles in the box.
You are essentially asking, "How long is a piece of string?" The purpose of chlorine is sanitation and the name of the game is maintaining a constant level of chlorine in the water. So, FIRST, you must know how much free chlorine and combined chlorine are in the water. To accomplish that (and more) you need to get a quality test kit that looks at Free and Combined Chlorine, pH, Calcium, Total Alkalinity, and CYA. A good Taylor K-2006-C kit is my recommendation. Then and only then can you assess how much chlorine has been used by the sun or by killing organic things we don't want to swim in. Once you know how much chlorine has been used, you can calculate how much chlorine (in this case at 10%) you need to add. Always test first and ONLY add that which is needed. You save a mint over going to the pool store.
There is no CYA in this product. It is excellent to use if you want to prevent too much CYA in your pool.
No, it is bleach without any other ingredients
this is not even close to a one lb bag of powdered shock it is nothing more than a glorified bottle of bleach trust me i have been through schools for pool maintenance and such and this was a joke.
Yes, but do not exceed recommended limits (2 to 5 ppm free chlorine)
In the bottle, it has a pH of around 12, so you don't want to splash this on unprotected skin (or clothes, either since this is nothing more than very strong bleach). Once mixed with water the sodium hypochlorite becomes hypochlorous acid and the pH becomes neutral.
The "born on" date is located at the top of the label on the bottle -- starts with the 2 digit year and then has another 3 digit number following. The 3 digit # is the day of the year. For example, if it says 19 010, it was produced January 10, 2019. (the 10 is the calendar date...up to 365) However, every HD I've been to stores this outside in the gardening dept as opposed to being stored inside. The package clearly states all bleach should be stored inside and out of the sun/heat to prevent the product from deteriorating. Very frustrating. I have to purchase the HDX germicidal bleach because it's stored inside. Buying bleach that's not stored correctly is a big waste of $...could be paying for water depending on how long it's been exposed to the elements.
Yes, it could, but it is 10% concentration, not the usual 5%-6%, so you would have to use VERY sparingly. Also, it would not be available in a "splashless" type mixture.