So i have been researching and looking for ATO units. i found a few, some a simple mechanical float valve and some electronic multi float valve setups. However, I have not found any that take into account the salinity as a safety check. I would love to have a probe in the tank monitoring salinity and a float valve at the same time. However the ATO will only kick off IF Salinity rises past 1.025 AND the water level drops enough to activate the float, and vice versa, if the float drops, the salinity must read 1.026 or higher. this way i can do a water change and not have to worry too much about the ATO kicking on. anyone know of any products out there that can do this? I know anything left in the water will start to get a build up but there is some maintenance associated with any ATO.