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Articles - Getting Rid of Algae
Articles - Getting Rid of Algae
Articles - Getting Rid of Algae
pool_closedGetting Rid Of Algae (And Keeping That Way)

Proper maintenance of pH and regular chlorination (1-3 ppm) will in theory prevent algae. That said, algae are extremely hardy little organisms and, in some cases the algae becomes so resistant to the normal sanitiser that treatment with an Algaecide is required.

The Main Kinds Of Algaecide
When you walk into any pool shop, it’s easy to be confused by the variant of brands and types all claiming to be miracle cures. We briefly summarise the two main types here:

1.Quats & Pollyquats
– the most widely sold. Also know as “quaternary ammonium salts”, they actually use the same chemical found in household cleaners (e.g. shower cleaners). Quats work by making the cell membranes of algae cells “more permeable” to water, eventually splitting and killing the algae organism.
If you have regular green algae, a Quat will work fine. If on the other hand you have black or mustard algae, make sure the algaecide is a Polyquat.

cleaning-algae 2.Copper & Silver Based – One of the older fashioned but effective algaecide uses soluble copper or silver to kill algae. Most commonly, the active ingredient is something like copper sulphate. While effective, the presence metals in the water can lead to long-term staining of the surface. Hence you recommend pool owners avoid this type.
Actually Treating and Removing Algae
While the perfect routine for your pool may vary, we find the following achieves results in nearly all cases:
1. Check your pH and adjust if necessary. Backwash if necessary
2. Super-chlorinate your pool to around 20-30 ppm (for a 50,000 litre pool, this means between 1.5 and 2 kg of dry chlorine.
3. When the chlorine levels approach normal (3-5 ppm) around 48 hours latter, add your algaecide according to the package instructions.
4. The next day, brush the walls and the floor of the pool.
5. When the dead algae has settled, vacuum away the dead algae an backwash if necessary.
6. Check and adjust your pH again
Keeping the Pool Algae Free in the future
Basically, all the basic steps required to maintain clear healthy pool water:
Make sure your pool is sanitised reliably every day – hence the value of automatic salt chlorinators, achieving a level of around 2 ppm by the end of the running cycle
Make sure you pH is in the correct range. Chlorine only works correctly when the pH level is correct.
Make sure you total alkalinity level is correct (typically by using bicarb soda). This makes it much easier to maintain a good stable pH level between pH tests.
Super-chlorinate your pool regularly (we recommend either every 4 weeks). Many newer salt chlorinators allow you to do this by simply pressing a button.
Finally and not least – Use a regular dose of an algaecide designed to prevent algae (an “algae inhibitor”). Using a small dose once every two weeks is inexpensive and much easier that treating a serious algae problem.

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