OverVerde Ltd. products

Barley straw has been used for many years for the control of algal growth in the fresh water systems of the UK. If used correctly it can be an excellent tool in the control of algae bloom formation. Mixed results have been reported on its use and while some swear by its effectiveness, others insist that it makes the algae problems worse. The Centre for Ecology and Hydrology have reported that certain conditions must be present for the effective use of barley straw. When these conditions are not provided then often the barley straw will make the problem worse.

The Mezzo-DB, is a state of the art ultrasonic device for algae and biofilm control. The Mezzo (Bi-Directional) - DB (Dual Bandwidth) offers features not found before in these types of devices. The bi-directional sound output is achieved with just one piezo sound emitter that operates in two different bandwidths for better control of green algae and diatoms in the lower bandwidth and blue-green algae in the higher bandwidth. The sound beam pattern would look like the illustration to the right with the sound coming from the square faces.

The *Quattro-DB® is a state of the art device by Hydro BioScience® for algae and biofilm control. The Quattro (4 Directional) - DB (Dual Bandwidth) offers features not found before in these types of devices. A radial sound output is achieved with two piezo sound emitters that can operate in two different bandwidths for better control of green algae and diatoms in the lower bandwidth and blue-green algae in the higher bandwidth, all accomplished with one device.