There may be a simple ...

There may be a simple solution.  We are exploring two mechanisms that may be useful.  Both involve elimination of the symbiotic bacteria layers on the plant roots that convert nitrate to nitrite to ammonium that feed the plant its nitrogen source.  One uses ultrasound to produce a false sensation of water turbulence that causes the bacteria to avoid colonization on the root.  Another technique is to use a bacillus bacteria strain that eats the polysaccharide that holds the root colony together.  For more information, contact george@algaecontrol.us