It is easy to tell if you need more chlorine pucks in your skimmer basket. Since they dissolve, once they have disappeared just add more. Chlorine pucks also allow you to manually control how much chlorine is in your pool's water. It is usually 1 chlorine puck for every 5,000 gallons of water.
To use the right number of tablets, always round your pool volume up to the nearest unit of 5,000 gallons. For instance, your pool has a capacity of 20,000 gallons, you would add four chlorine tablets. But if your pool holds just 16,000 gallons, you'd still use four, three-inch chlorine tablets.
No other type of chemi- cal should ever be used in your chlorine feeder. Your CL-220 holds up to 18 large (3" diameter) tablets (about 9 lbs.)
Properly stored chlorine tablets should last three to five years. The storage site should be cool, dry and well-ventilated, such as in a basement.
Your CL-220 holds up to 18 large (3″ diameter) tablets (about 9 lbs.) and has a dial type control valve to regulate the rate of water flow through the chlorine feeder. This large capacity feature, under normal conditions, should provide a minimum of two weeks chlorination for large pools.
When it comes to chlorine pucks most of the work gets done by the dispenser. There are only two ways to dispense your pucks and that is with the use of an in-line chlorinator of a floating dispenser. Simply putting the chlorine pucks in your skimmer is something you should never do.
For every 1 ppm of chlorine you add with pucks, you add 0.6 ppm of CYA.
Do Chlorine Tablets Go Bad? The simple answer to this question is yes. Like any chemicals, chlorine tablets go bad if left long enough or improperly stored. Kept in the right conditions, however, and they can remain effective for over five years.
Small 20g chlorine tablets will dissolve slowly over a period of 3-7 days depending on water flow, water temperature and hot tub usage.
If you store it in an area that is well ventilated, you should be OK. Chlorine tabs are OK to stay outdoors -- in general, solid chemicals are OK outdoors as they have no water to freeze.
Add one tablet for every 5,000 gallons of water and always round up. For example, if your pool has 21,000 gallons of water, add five tablets per week. If it has 8,000 gallons, use two tablets.
2. Check chlorinator or floater weekly and refill as needed. Adding chlorine tablets to your chlorinator or floater should be part of your weekly maintenance. Every week when adding your other maintenance chemicals, you should be checking your chlorinator or floater to see if any tablets need to be added.
If you're using the Water TechniX Salt water chlorinator then you should try to aim for a salt level of around 3,000 to 4,000 ppm.
*1 gallon of chlorinating liquid delivers the same amount of chlorine as 2 chlorinating tablets.
In most cases, you're best off with 3-inch chlorine tablets, as one single tablet can treat up to 5,000 gallons of water. On the other hand, 1-inch tablets contain far less chlorine (about half as much as 3-inch tablets), so they're better suited for smaller indoor pools and spas.
Never put chlorine tablets into the skimmer baskets of your pool. Some pool companies will put chlorine tablets directly into the skimmer baskets of the pool. Never allow anyone to put chlorine tablets in these skimmer baskets.
Tablets will last approximately 5-7 days depending upon temperature and amount of water flow.
Ideal Size for Floaters or Automatic Chlorinators
Each slow-dissolving chlorine puck adds 5.5 ppm of chlorine per 10,000 gallons over several days. Most pools use about one 3 inch tablet for every 5,000 gallons of pool water, replaced every 5-7 days.
You can use half tablets too, score them with a screwdriver, and break it in half with your hands, underwater in the skimmer basket.
Liquid Chlorine has the shortest shelf life of all your pool chemicals, losing up to 50% or half of its potency six months from when it was first opened and up to 90% after a year.
Liquid chlorine is a much better choice than tablets for shocking. It is going to go to work right away and get your chlorine levels high in a short time. Saying that, it is an expensive way to do it. Calcium Hypochlorite (cal-hypo) is a much more cost effective way.
One 3" Trichlor puck is usually 8 ounces weight or half a pound, though some pucks are 7 ounces or 6 ounces (depending on brand). Another way of looking at this is that for every 1 ppm FC added by Trichlor you also add 0.6 ppm CYA.
Daily application can easily lead to a concentration of 80 parts per million (ppm) CYA. For every pound of trichlor added (roughly two 3" tablets) to 10,000 gallons of water, the CYA increases 7 ppm. For every pound of dichlor added (roughly two 3" tablets) to 10,000 gallons of water, the CYA increases 6‒7 ppm.
Trichlor contains 54% cyanuric acid.