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Old 06/29/2014, 01:30 PM   #1
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Overflow lines question

How often are the overflow lines used once the system is dialed in to 1 gallon per minute? I have pretty long runs from my mixing tank & sump to the measuring containers so if i can just run them to the sink without wasting too much then I might consider that option.

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Old 06/30/2014, 05:22 AM   #2
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Generally only a small amount of water (probably 1/2 cup or so) may overflow into the overflow lines. In a large system the removal of this relatively small volume of water from the system may not cause much of a downward salinity drift, but in a smaller system it would be more noticeable.

Keep in mind that your automatic top off system will replace this loss with fresh water, causing the downward salinity drift over time. Therefore it may be a good idea to mix your replacement water so that it is very slightly higher than the water in your system. This also helps account for water removed by your skimmer, acclimating livestock, and other activities where you remove some of your system's water and it is automatically replaced by your top off system.

Hope this helps!

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Old 06/30/2014, 09:19 AM   #3
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Thanks, it's going to be a 360 gallon DT with probably 40 gallons in the sump (80 gallon capacity) so that small amount will not swing salinity. Thanks for the answer, can't wait to see this in action.

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Old 07/03/2014, 12:19 AM   #4
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it also depends on the pump pushing the water into the metering wells. i noticed my new saltwater mix bin is right under the wells and that well fills up fast with a lot of pressure thus overflowing lot of water back to bin while the sump if 15 ft away and that pump dont push so hard due to head pressure and length of the pipe and that well hardly every have an overflow and in case it does its barely in drops.
you can use a gate/ball valve to dial the water pressure in but remind you if wells dont fill up in certain time system will hault indicating fault and stop doing water change so you will have to be very precise.

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Old 07/23/2014, 10:35 AM   #5
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Originally Posted by Raoul5Duke View Post
Thanks, it's going to be a 360 gallon DT with probably 40 gallons in the sump (80 gallon capacity) so that small amount will not swing salinity. Thanks for the answer, can't wait to see this in action.
It will definitely swing the salinity over time and the more you change out the more that will go through the overflow. I'd strongly suggest using the overflow lines and plumbing them back to their source. You are already running lines so it would be silly to not include those return lines in your plan.

I have a 600+ gallon volume. My water holding tanks are located outside the house where my shed is and plumbed through the wall. The new water metering bin is located in the shed with the holding tanks. The waste water metering bin is located by the sump in the house. Both are upwards of 10' apart and the waste water goes out of the house, through the wall and into a drain line in my shed. Trust me, if you are doing 3-5 gallons of water change a day, or even less, there will still be an impact on your salinity. While it may be slow, this not only will impact your salinity but it will also impact your skimmer adjustments because the waters density changes with the salinity and even a slight change in salinity will impact the skimmers performance.

Just locate the waste water metering bin near your sump and route the waste line in a downward fashion to where ever it will drain to. Genesis has extension cables so it's easy to remotely locate the metering bins just as I have done.

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