Hello have the product in accordance with statement. The filamentous algae were almost completely after about 4 weeks away. Unfortunately, here come the algae after about 6 more weeks again in the usual way. Therefore, this product as similar other is useless in my opinion. Can the positive reviews tell just that they were written after the first success and the long-term effect has not been evaluated. This is admittedly very naive. (Carefully Formulated)
I Meant: Approximately 5000ltr.Grundwasser fed / 5 Kois / 2 trout / div. Crayfish / North Location / trickle with UVC clarifier.