Use biocides safely. Always read the label and product information before use.
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Any algae control product that kills algae, such as JBL AlgoPond forte, AlgoPond green, or Algol, causes the dead algae to decompose biologically and be broken down by bacteria. This in turn leads to enormous oxygen consumption by the bacteria (nitrification) and the release of the nutrients nitrate and phosphate, which were "bound" in the algae. In principle, this feeds the next generation of algae. This is why JBL always recommends binding the released nutrients as the final step in algae control after targeted treatment with an algae product. Since it is sufficient to remove one of the two nutrients, we recommend phosphate removal, which can be done very easily with a good phosphate remover (JBL PhosEx Pond or JBL PhosEx). Incidentally, it therefore always makes sense to remove dying or dead algae mechanically. The less algae is broken down, the fewer nutrients are released again!
Start using the algae treatment by changing at least 30% of the water, as described on the product label. If the algae are stubborn, you can add another dose after 5 days. This means you'll need to change the water again before adding another dose. If you don't repeat the treatment, it's still a good idea to change the water to reduce the amount of dead algae in the tank.
When using JBL Algol repeatedly, we recommend waiting 7 days between applications. Before reapplying, be sure to change 50-70% of the water. Please note that harmful effects on aquatic plants cannot be ruled out with repeated use. Furthermore, JBL Algol does not eliminate the cause of emerging algae growth. In this case, the care conditions should be checked.
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