Devices used for monitoring and controlling the environment of aquaculture pens for live marine and freshwater species, namely, thermostats; test and measurement instrumentation, namely, devices to test and measure water chemistry and other water parameters, namely, the amount of ammonia, nitrites, nitrates, and chlorine in water, the amounts of solids and gases such as carbon dioxide and dissolved oxygen in water, temperature, pH, light, conductivity, salinity, flow rate, water level, curren...