Hedge plants

Algae in the pool - causes & tips to combat


When the water in the pool turns green, the bathing fun is gone. With a few simple steps you can get the problem under control and the water crystal clear.

© Clem / stock.adobe.com If you integrate a pool in the garden, it will not only please children. After all, not only can you romp and splash around in the pool, you can also train your stamina or just enjoy the cool water. But above all, it is the children who love to jump in the pool. According to Statista, 26 percent of girls and 24 percent of boys like to go swimming. Bathing fun is quickly clouded, however, when the water quality is no longer the best. Especially when the water turns green. This is due to algae, which not only make the water unsightly, but are also an ideal breeding ground for bacteria and pathogens. Even though algae are important for our climate, according to planet-wissen.de, they are just unsightly and annoying in the pool at home.

However, the actual trigger for discolored pool water is a lack of pool maintenance. If you do not stay on the ball here and do not clean the pool regularly and provide it with the necessary maintenance products, you should not be surprised that the water is dirty. However, once it does happen, it is not the end of the world. With a few simple steps you will get the water back algae-free and crystal clear again. Below we explain how to do this.

Causes of the formation of algae in the pool

If you decide to integrate a pool in the garden, you should find out exactly how it is properly maintained. If you don't do that, you won't enjoy the new achievement very much from the start. Because only with the right care will the pool always be clean and the water clear. Proper care means, above all, that the pool must be thoroughly cleaned regularly and the appropriate maintenance products added to the water. Those who neglect this need not be surprised if the water turns cloudy or even green.

Algae are mainly created in the pool if there is not enough algae protection in the water. However, the wrong pH value can also be to blame for the formation of the algae. Or soiling from leaves, hair, dandruff or sunscreen. Algae also spread very strongly in the pool when the weather is very hot and the water in the pool heats up accordingly. This favors algae growth very much. Algae can develop very quickly if you are not careful.

How to rid your pool of algae

You need:

  • Sponges and brushes
  • landing net
  • pH lifter or pH reducer
  • granular chlorine
  • Alga protection
  • Test strips for water analysis of pH and chlorine

When you have everything together, you can start fighting algae. For example, I found practical water care sets with everything you need to combat algae on Amazon:

1 PoolsBest Pool Starter Set 5in1 for beginners 211 reviews29,90 €To the shop
2 Intex 28003 pool cleaning set with landing net, floor vacuum… 1,434 reviews€ 39.90 from € 11.95To the shop

❶ Clean pool water:

First of all, you have to lend a hand and clean the pool. This includes the walls, the floor and the steps. Then fish the algae with a net and pump the water through the filter system and backwash the filter. If the infestation is low, the circulation pump should run continuously for 24 to 48 hours. In the case of a massive infestation longer than 48 hours.

There are cleaning robots that automatically keep the pool clean electronically. So you can make your work a lot easier, because such cleaning robots work on the same principle as vacuum cleaner robots and systematically sweep all parts of the pool.

❷ Bring the pH value to the optimum level:

Now you should check the pH value of the pool, because if the pool is full of algae, the pH value is often out of balance. To check this, you can use special test strips. The pH should ideally be between 7.0 and 7.4. If the value is too high or too low, you must first bring it back to an optimum with the help of chemical preparations. If the pH is too low, a pH lifter should be used. If it is too high, a pH reducer must be used.

❸ Carry out shock chlorination:

In the next step, you should perform a shock chlorination to finally remove the algae from the pool. Simply add the preparation to the pool water in the recommended amount from the manufacturer via the filter system or the skimmer. First switch on the filter pump, then add the chlorine to the skimmer and then filter thoroughly. Then thoroughly clean the filter inserts or backwash the sand filter system. The chlorine effectively kills all algae.

If you have a lot of algae in the pool, you may need to treat the water a second time to remove all algae. If the water looks milky afterwards, you don't have to be surprised. Once it has passed through the filter, it should clear up again.

❹ Add algae protection agents to the pool:

Once all the algae have been removed from the pool, you should add a seaweed protection agent to the pool water to prevent the formation of new algae. Proceed as described in the previous step so that the agent is evenly distributed in the entire pool water. As for the dosage of the algicide, it is best to follow the manufacturer's instructions.

❺ Check the pH value and chlorine content again:

When all the algae have disappeared from the pool and the water is crystal clear, check the pH and the chlorine content of the water again. Both values ​​should now be at a normal level. If not, then you have to help again with a pH lifter or pH reducer and / or chlorine.

Important for all steps:
Always mix chemicals into water and not water into chemicals. Otherwise a strong chemical reaction can occur which could harm you. In addition, always be careful when handling chemicals and it is best to wear gloves. Also, do not inhale the chemicals.

This is how you can prevent the formation of algae

© Davizro Photography - Fotolia.com

❍ Tip 1 - the correct location of the pool:

If you want to effectively prevent algae from quickly developing in the pool, you should pay attention to the correct location when planning the pool. It is best not to have any trees or shrubs near the pool. In addition, it is best to place the pool in a shady place, because if the location is too sunny, it promotes the formation of algae.

❍ Tip 2 - use the pool cover:

To prevent dirt from getting into the pool, it is best to always cover it when not in use. This way, no leaves or animals can get into the pool and decompose there. The cover also protects against too much sunlight, which in turn also promotes the formation of algae.

❍ Tip 3 - Install filter system:

A pool with a filter system can make cleaning the water much easier. Sand filter systems are ideal here because:

  • they are suitable for continuous operation
  • the filter performance is higher compared to a cartridge filter system
  • the filter medium is cleaned by backwashing and can be reused
  • the operation of a sand filter system runs almost maintenance-free
1 Steinbach Speed ​​Clean Comfort 50 sand filter system,… 1,029 reviewsfrom € 99.99To the shop
2 Miganeo 40385 sand filter system Dynamic 6500… 302 ratings89,90 €To the shop

If you have such a system, all you have to do is put the pool chemistry into the water and switch on the sand filter system. The pool chemistry is optimally distributed throughout the pool. Algae will then disappear again in no time, or they will not be able to develop in the first place. If you are still looking: Poolomio.de has sand filter systems for the pool. The filter systems from there can be connected immediately and without additional adapters.

4 Tip 4 - Clean the pool regularly:

A pool cover and a filter system are very good means to keep the pool clean. Nevertheless, you should regularly hold a landing net in your hand and remove leaves and Co. from the water surface. In order to remove the dirt from the floor, walls and steps, however, a cleaning robot is best. Otherwise you have to go to work with pool brushes etc. to clean the pool.

❍ Tip 5 - Check the pH value and chlorine content regularly:

Regularly check the pH value and the chlorine content of the water and correct the values ​​with the appropriate means if necessary. If one of the two values, or even both, get out of balance, this favors the formation of algae. It is best to always have a pH between 7.0 and 7.4. The chlorine content, however, is between 1.0 and 3.0.