In order to test pool water at higher levels, use the shot glass method of dilution, a shot glass being 'one part'. Take one part pool water and one part distilled water, mix together, and use this mixture to test the chlorine. Take the chlorine reading and multiply by 2. If still too high to measure, take one part pool water and 2 parts distilled water, mix, then test, take chlorine reading, and multiply by 3.Originally Posted by raptureready1953
Now, to answer your questions:
1. The amount of chlorine you'll need to add depends upon what residual chlorine you have in your pool. Test the water at least 2x day. You'll most likely need to add chlorine after each test to bring it back up to shock levels. For your pool shock level being 15ppm. See below chart:
Ben's 'best guess' chlorine guide. Use the info in this chart to help you figure out what levels of chlorine you need to maintain in your pool based on the amount of CYA (cyanuric acid, also called stabilizer) that you have in your pool. (FC = free chlorine)
Stabilizer(CYA) . . . Min. FC . . . . Max FC . . . 'Shock' FC
=> 0 ppm . . . . . . . .1 ppm . . . . . 3 ppm . . . . 10 ppm
=> 10 - 20 ppm . . . .2 ppm . . . . . 5 ppm . . . . 12 ppm
=> 30 - 50 ppm . . . .3 ppm . . . . . 6 ppm . . . . 15 ppm
=> 60 - 90 ppm . . . .5 ppm . . . . . 10 ppm . . .. 20 ppm
=> 100 - 200 ppm . . 8 ppm . . . . . 15 ppm . . .. 25 ppm
Now, one gallon of bleach will raise the chlorine in your pool to 13, which is pretty close to 15 (shock level). If testing reveals ZERO chlorine in your pool (which may occur due to the algae), then you'll need to add a smidge more. To add the bleach, IF YOU DO NOT HAVE AN INLINE CHLORINATOR, then pour all at once SLOWLY through the skimmer. Or, if you wish, pour around the perimeter of the pool. KEEP FILTER ON 24/7. When I had my first algae bloom at start up years ago, I never vacuumed; brushed and brushed so algae would get filtered, then backwashed about 2-3x/day.
2. Well, if the pool is green, why would you want to swim in it anyway? I keep my chlorine around 5ppm as my CYA is 70ppm. Perfectly fine. My suits do not fade. I do not glow in the dark. If your pool clears and while waiting for the chlorine to come back down, go ahead and swim if chlorine is <10ppm, just wear an old suit. Remember, the free chlorine level is dependent upon the CYA level. Think of it this way, the CYA binds to the chlorine, making higher levels not as toxic. If you have zero CYA and a chlorine of 10, then that would be very high, indeed.
3. Think of this as a learning process.
Good luck.
CaryB
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