WHEN TO SHOCK AND WHICH SHOCK TO USE
- IF THE WATER IS GREEN
- You need to shock, no doubt about it, BUT FIRST, make sure that the total alkalinity is between 125 - 150PPM (for pools with a liner or concrete) (100 - 125PPM salt or fiberglass pools), and that the Ph is at 7.5, otherwise, the shock will not be as effective as it should, if at all.
- Use a concentrated algeacide, IE 40% or more and granular shock. The greener the water, the more chemicals required.
- IF THE WATER IS WHITE
- You probably need to use an oxydizer and not a shock - It's the organic matter (from bathers) and chloramines (chlorine residue that smells and stings) in the water that make it cloudy or witish.
- 1 bag per 40,000L - 15 minutes waiting time, that's all
- IF YOU ARE USING GRANULAR CHLORINE (CALCIUM HYPOCHLORITE MORE EXACTLY) WHICH IS CHEAPER AND AVAILABLE EVERYWHERE
- Then it's the calcium in it that didn't dissolve.
- You need to add a clarifyer and it would be best to change to trichloro chlorine which nas no calcium in it.
- No need to raise the chlorine level above 3PPM
- Oxydize if required