 Typically, in these applications, total dissolved solids are tested frequently, and filtration membranes are checked in order to prevent adverse effects.In the case of hydroponics and aquaculture, TDS is often monitored in order to create a water quality environment favorable for organism productivity.For freshwater oysters, trouts, and other high value seafood, highest productivity and economic returns are achieved by mimicking the TDS and pH levels of each species' native environment.