Hydrosmart's resonance frequency approach involves the modulation of electrical impulses through the water being condition. The system has now been installed on the water reticulatory lines at three of five tanks devoted to farming barramundi.

Paul Pearce, Director of Hydrosmart International, said that after several months, water in the tanks that are the subject of the trial remains unusually high in clarity and free of visible algae or biofilm build up. There has also been a consequential reduction of approximately 40% of biomass on the tanks' biofilter systems, accompanied by an apparent reduction in nitrates and phosphate levels, notable by a major drop in odour on the indoor area housing the tanks.

According to Paul, the maintenance routine at Urrbrae usually consists of cleaning buildup of biofilm from tank walls and floors weekly and topping up with a percentage of fresh water to assist pH balancing.

This has been unnecessary on the tanks using the water conditioner as the water has remained stable without the need for any

Paul adds that maintenance staff have also observed that fish in the treated tanks are larger than those in the untreated tanks. This is consistent with a lack of biofilm and algae on the fish gills, which in a manner similar to keeping membranes clean, represents a probability of increased oxygen transfer thus enabling healthy metabolic process and improved growth.

The trial is running until the fish are 'plate sized' at which time they will be harvested by the schools students. Other projects utilising Hydrosmart's resonance frequency approach include a desalination unit on an ocean-going sheep carrier headed to China, treating waste EQ ponds in textile factories in Thailand and for algae control at Bangkok Zoo.