The algaecide isn't a requirement for saltwater pools, but there's no reason not to use it. However, the best way to control algae is to keep the pool water balanced because algae love it when pH or total alkalinity gets too high.
Algaecide should be added to your pool water on a weekly basis. Preventing algae is the key to fun in your pool. Algaecides act as a backup to your normal sanitization program and prevent algae from starting and growing in the pool. Algaecide should be added after every shock treatment.
While green algae are endemic in salt water pools, they are the easiest to kill. Green algae tend to grow during summers when the temperatures can get high. They float freely in the pool, making the water green. You might even see them growing on the bottom of the pool, on the walls, or in the crevices.
A salt chlorine generator is your friend in the fight against algae contamination. It converts the salt you add to your pool into chlorine via an electric current that zaps the pool water as it passes through the machine. By comparison, in a standard pool, the chlorine is added directly to the pool water.
You'd think salt would kill algae. Sort of like slugs. But no, algae is impervious to salt, so you've gotta do a little more work to remove it from a salt water pool.
Chlorine needs the right pH to work
As the pH moves away from the optimum level the chlorine rapidly stops killing algae. If your pH is sufficiently out of whack, even if it has a level of chlorine that is normally correct, your pool will go green.
Lower pH by adding muriatic acid or sodium disulfide to the water, and raise it by adding baking soda (sodium bicarbonate) or soda ash (sodium carbonate). Check the total alkalinity of the pool water before raising pH. If it's near the acceptable range of 80 to 120 ppm, use soda ash.
So, not only is shocking a saltwater pool okay, but it's actually important to your pool's health. Shocking is the process in which you overload your pool with chlorine (3-5 times the normal amount) to improve your pool's cleanliness and kill off organic matter.
Use the biguanide algaecide for your pool, measuring 16 ounces for every 10,000 gallons of water.
Just like a chlorine-based pool, saltwater pools turn cloudy when chemicals are not balanced. You need to ensure that all chemicals are balanced all the time to avoid cloudy water and growth of algae. The major causes of cloudiness are chlorine, pH, Salinity, total alkalinity, cyanuric acid, and calcium hardness.
While all pools require chemicals to maintain clean, clear water, salt water pools are more stable than traditional chlorinated pools, so they require fewer chemicals.
While shocking and adding algaecide is effective in getting rid of algae, it should not be done together. This is because when you mix chlorine and algaecide together, it renders both of them useless. Hence, you should first shock the pool and wait for the chlorine levels to fall below 5 PPM.
Add a dose of algaecide, bring your chlorine level high by shocking, and run the filter continuously until the problem clears. The next day you should vacuum up the dead algae and backwash your filter. Algae thrives in hot weather and in pools with low or no chlorine.
If you add algaecide, keep in mind that some algaecide contains copper, which can actually make a pool cloudy. If the cloudiness persists 24 hours after shocking, then it's possible that you used a poor-quality chlorine shock.
The presence of too much algaecide can lead to a foamy pool water. Small bubbles will begin to be produced as the water is pushed through the return jet and back into the pool. Do not confuse these bubbles and foam with another common problem, which is air in your pool lines.
GETTING RID OF ALGAE
Liquid Algaecide is a strong algae depressant used for the prevention of algae growth and the maintenance of sparkling water in pools. Algae growth is the main cause of “off” colours in your swimming pool water.
Besides normal and good water balance, all you need for a salt water pool is a chlorine generator and enough pool salt to raise the level to the salt system manufacturer's recommendation. You will still need to maintain good water balance on a salt water pool.
Most recommend an ideal pH of 7.4–7.6 (7.2–7.8 acceptable), Total Alkalinity between 80–120 ppm, and Calcium Hardness around 200–400 ppm. Use water balancers to adjust your water into the proper ranges. Cyanuric Acid levels are very important for saltwater chlorinators.
A salt water pool creates sodium hydroxide as a byproduct because the sodium in the water combines with the oxygen and hydrogen molecules. One of the reasons behind your pool's high pH level could very well be the sodium hydroxide because this system itself has a surprisingly high pH.
Stabilizer is a chemical added to offset the harshness of chlorine. Because saltwater pools don't have the chemical chlorine, a stabilizer isn't required.
Shock your pool once a week with Salinity Surge Shock or Salinity Oxidizing Shock. Pool shock works as an added defense against bacteria and contaminants. With Oxidizing shock, you can use your pool after just 15 minutes!
You can convert your chlorine pool into a saltwater swimming pool and enjoy the benefits of salt water chlorination right in your own backyard. If your pool has a traditional chlorine sanitization system, you can easily switch to Hayward's advanced salt chlorination system.
Winter Pool Algaecide is highly effective at preventing all forms of algae. Polymer pool algaecide stays strong all winter providing dependable control of algae growth throughout the winter season. Unique winterizing algaecide is specifically formulated to fight cold weather algae for up to 5 months in a covered pool.