n2585722
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My Tank Thread
I custom built a 4k gallon a day RO/DI system. It has solenoids on the incoming and and outgoing sides to make sure the flow stops when it is supposed to. It has a custom built TDS control system that monitors TDS going in, TDS After the Prefilters, TDS After the Membrane and TDS after the DI Resin Tank. If any of the TDS go below the set value an alarm goes off and alerts me it's time to change something. My RO/DI system is outside my house and I use as much as 75g a day during the summer time. With a commercial RO System and Membrane and a 50lb tank of DI Resin, this system only requires attention about once a year for something. Pre-Filters last 2+ years, Membranes Last 2 years, DI Resin tank gets exchanged every 12 months by a service company.
I use my Hydros to control my RODI and mixing station. I also have solenoids on the input and the outputs of the RODI. I have low level and full sensors in the three storage tanks. The input to the tanks also have a float valve as a backup. The on time of the RODI is also limited and will shut off the input solenoid if the time is exceeded. As another failsafe there is a leak detector under the RODI and near the three storage tanks. My RODI and storage tanks are in the garage. The ATO and AWC pumps are also in the garage. The tank is 35ft away from the garage. Since on the Hydros there is no single brain and each module is a controller but can be members of a collective. In a collective they share inputs and outputs between each other so you can control an output on one controller with a input on another. The communication for this between the controllers happens over the command bus. So the controllers are hardwired to each other. I currently have 6 controllers in the garage controlling the RODI, mixing station, ATO and AWC. There are 7 controllers at the tank that control lights, heaters, pumps and alkalinity testing on a schedule. It also controls dynamic dosing of All For Reef and a KH buffer using the alkalinity readings. So far the controller has saved several times. One of those was not even a aquarium issue. I have a leak detector under my air conditioning unit and it detected a leak and sent an alarm. When I check the drain hose had cracked and it was leaking on the floor underneath the unit. There is a sunken living room next to the closet the air conditioner is in. It has a wooden floor. If that leak would not have been caught so soon it probably would have ruined the wooden floor. Most of the time when I get a critical alert it was something I did or forgot to do and the controller caught it before it became a disaster.The brand name controller watches all these things - but doesn't have the ability to control any of the critical things. It controls things like in-tank flow pumps on random timers, tank lighting, and limiting by time the amount the RO system can run when it is needed ( a third level backup).
Dave B