Carboys are blue containers...some are square, some are round--but most stores use the square ones and you can return the "deposit" carboys to any store that uses them. Some stores have 2.5 gallons, but here in NJ they are mostly 5 gallons.

Better than a syphon: A lot of the pool stores sell a spigot for the carboys for about $4. that replaces the cap--like an old-fashioned beer-barrel tap.

You can test the strength yourself:
1) Use a 1 ml eyedropper (most drug stores have them, or a child's used-up cold medicine eye-dropper).
2)Add 1 ml to 10 liters of tap water
3) that's5x 2 liter soda bottles and you are diluting it to a concentration of 1:10,000.
4) and measure EXACTLY as if you were testing your pool.
5) Whatever you read (say, 5.75ppm or 13.5ppm) is the REAL concentration of the bleach/liquid chlorine.


You MAY want to test your tap water first for chlorine and adjust accordingly.