The increasing use of fertilizers in agriculture provokes a phosphate concentration in the tap water. On the other hand the remainder of food, the excreta, the phosphate fertilizers for plants and the decay of organisms contribute also to a higher phosphate level. If the latter exceeds 0,5mg/l the algae growth becomes quickly uncontrollable. The brush algae, the beard algae and the blue algae (Cyanobacteria) will pollute the freshwater and the green filamentous (Spirogyra, sp.) and red smear algae will infest the seawater. Phosphate is an ideal fertilizer for these algae. Some corals, especially the hard corals, are very sensitive to phosphate and die when the water has an excessive phosphate concentration. PREIS-REDU-PHOS is guaranteed for its absorbency of phosphate and its ability to retain it.
These special mineral granulates will not release any of the substances which had been absorbed in the water, even when the product stops being active. By depriving the algae of their food, we reduce their growth. This can be considered a big step in the battle against algae.