Water Exchange Station:
One thing that I hated about my old system was the water exchange process. I only had a ATO system, and that only held 5 gallons. This meant that I was always making RO water and mixing salt water. I always ended up forgetting the water was on, and flood my garage floor. In designing this new setup I made it a priority to automate this process. I looked into the Genesis RENEWâ„¢ Automatic Water Change System, and love it. I thought this would be the best route, unfortunately the price point was beyond my reach. Therefor I need to find an alternative.
I decide to install a MasterFlex dual head dosing pump. I picked this up used from a local reefer that was getting out. The setup is simple enough, two hoses that pump water at the same rate. The first hose would pull "dirty" water from the tank and expel it in a runoff. The second would pump "clean" water from a SW barrel to the tank. Because the MasterFlex drives both heads at the same time, the ratio of dirty water to clean water is the same. I have the it connected to a timer which turns on in the early morning. It replaces about 3 gallons a day.
Next I need to find barrels to suit my needs. My requirements were that they held 40+ gallons and fit into a corner of my garage, not preventing my car from getting in. Also the needed to be easy to open and close, so I could add salt without trouble. I found a perfect match from a local guy selling food grade barrels. They had easy to open lids, and held 55g. I built a rack so they could stack. The Top barrel is for RO and the bottom SW. The RO container is connected to the RO/DI filter and auto fills based on a float switch. I installed a ball valve on the bottom of the RO container, allowing me to fill the SW barrel when mixing was required. I also put in a series of connection at the side of the barrel. One is a hose bib to allow for large amount of RO water to be filled into containers. The second is a small ball valve to allow me to fill small container, such as my lab wash bottles. The last is a connection to my ATO.
The bottom barrel was placed on a drum cart that I order from Amazon. The cart was a little costly, but well worth it. Once full the drum weighs quite a bit, and impossible to move. With the cart, it's as easy pushing a wagon. I hooked up a pump to the SW barrel as well. This aids in the mixing of the SW, and also pumps SW to various contains if needed. This is possible because of the design in plumbing. (Note the ball valve near the top of the drum).
I am in love with this setup! Automating this process has made this hobby so much more enjoyable, and my tank LOVES it as well. There has been zero swing in salinity or nitrate. I would higgling recommend anyone setting up something similar.
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