jw why such a small RODI system? seems like with a tank that larger you would need a RODI that could produce more water a day for topoff and in-case of emergency
First off, i chose this RO system because it was a local guy to me and i could easily pick it up. Second was it was a great price and brand new. Lastly it came with a top off.
Next, you will have to have a little patients. Sorry taking a long time to get this build completed. I am building my system in a specific order. First the frag tank and sump plumbed together. Next will be my water storage/RO system/water mixing station. Then finally my display and misc. items.
My water storage/ RO system/ water mixing station will consist of a 55g drum barrel and 2 custom acrylic 40g tanks. The 55g drum will be used for fresh RO water storage. It will be plumbed to 2 40g salt mixing tanks. Directly after a water change, i can fill my 40g tanks back up from my 55g drum. Essentially i will have 135 gallons of fresh water ready to use at all times. I can shut off all water going to the display tank and can isolate just my 57g frag tank at anytime incase of an emergency. I will have 80g of Ready to use salt water to make a large water change to my frag tank if needed once all corals are pulled from the display tank and placed into the frag tank.
My system is going to be just over 400 gallons. 135 gallons of storage water will be more than plenty for my piece of mind.
Top off i am rough estimating 3-4 gallons at the most of evaporation. I will be running a chiller and T5's my temp will never be more than 79 degrees and the tank is located in a basement. Before the upgrade i was actually using the 57g frag tank as my display tank and had a chiller and T5's on it and never toped off more than half a gallon a day.
Also my system will have 2 auto top offs. One inside the 55g drum barrel to stop making RO water when full and the second one will be in my sump coming from the 55g drum with a small powerhead. The 55g drum barrels will have a ball valve that drains into the 2 40g acrylic salt mixing tanks.
How large of tank do you have and how much top off do you have to do?