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  1. #21
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    Quote Originally Posted by Cody View Post
    The stenner 170DMP5 is the best, but that one is perfectly fine. If I got a deal on one of those, I would absolutely use it too.

    Some pointers for when you set it up. The exchange rate isn't always perfect. For some reason, there might be slight differences between the two heads. However, these pumps are consist in that exchange. Once you get the exchange rate figured out, you need to dial in the salinity of your saltwater storage container to compensate. If the pump takes out more water than it replaces, then the salinity of the container needs to be higher than your target salinity. If the pump puts in more than it takes out, then the salinity needs to be lower than your target. Greggs does the latter.

    Every 4-6 weeks, check the salinity of the display tank. I found that until I dialed in my resevouir salinity, I would drop or raise .001 salinity, which isn't a big deal. That could be due to skimmer discharge, dripping water out of the tank, creep, etc. Just periodically check the salinity of your tank.
    Hi Cody, thanks for the tips.
    I am headed off on vacation next week so I won't be setting this up until I get back. Just have to do a big WC before I leave.

  2. #22
    Secretary Cody's Avatar
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    Quote Originally Posted by reeftopia View Post
    yes I call the wife she can forget to turn valve back off also. But no problem sump now
    full it will take almost a week before its back down. Have to admit back when I traveled
    the world that would have been nice. But would that work Beijing, Tahiti, Bora Bora, Rio

    From my understanding, it should work from anywhere you can get internet access.
    Dr. Cody Noel VIII Ph.D, M.D.
    M.A.R.S.H. - Secretary
    Marine Aquarium and Reef Society of Houston

  3. #23
    Treasurer Gregg's Avatar
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    Quote Originally Posted by Cody View Post
    From my understanding, it should work from anywhere you can get internet access.
    even without internet it works. Once you program it then it just continues doing it everyday until one of the sensors tells it to stop.
    Gregg Hamilton
    M.A.R.S.H. - Treasurer / Webmaster
    Marine Aquarium and Reef Society of Houston

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  5. #24
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    Quote Originally Posted by Gregg View Post
    even without internet it works. Once you program it then it just continues doing it everyday until one of the sensors tells it to stop.
    I have it setup on my tank and love it! As an additional safety Measure yo can put the apex flow meter on the in and out lines so that you can see both sides are working. I ave both auto-top and water change automated. I also so have a salinity probe to monitor that as well. Less things to worry about when I go on vacation.


    Sent from my iPhone using Tapatalk

  6. #25
    Treasurer Gregg's Avatar
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    Because the exchange rate is not exact ya kinda need to dial it in. But once you do and can get a straight line then you're good to go!
    IMG_2672.jpg
    Gregg Hamilton
    M.A.R.S.H. - Treasurer / Webmaster
    Marine Aquarium and Reef Society of Houston

  7. #26
    Supporting Member Reefahholic's Avatar
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    So are you guys using time commands on the Apex or Float switches?

    When I did mine I was using floats. The only thing I had to worry about was a back siphon from the water change reservoir so I put the fill water line up the back of the display and kept it out of the water. So no back siphon either way.

    How exactly are you guys doing it?

  8. #27
    Secretary Cody's Avatar
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    Quote Originally Posted by Reefahholic View Post
    So are you guys using time commands on the Apex or Float switches?

    When I did mine I was using floats. The only thing I had to worry about was a back siphon from the water change reservoir so I put the fill water line up the back of the display and kept it out of the water. So no back siphon either way.

    How exactly are you guys doing it?
    All you need is a dual head stenner pump, and any sort of trimmer. You calculate the flow per minutes and set the timer to turn on for however long it takes to change the quantity of water that you want.
    Dr. Cody Noel VIII Ph.D, M.D.
    M.A.R.S.H. - Secretary
    Marine Aquarium and Reef Society of Houston

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  10. #28
    Supporting Member Reefahholic's Avatar
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    Ok, sounds good. Seems like a low flow pump will be pretty accurate.

    Where are you guys running the fill and drain lines?

    I wanna set another one up, but not sure how I wanna do it.

  11. #29
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  12. #30
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    I’m assuming you guys are running R/O tubing on your pump heads to reduce the cost of expensive silicone? One thing I do like about this method is that since there is only one motor and two independent heads running at low flow- it’s pretty safe to say it’s fairly close/accurate as to the amount of water being exchanged. You can’t do this with two mag 5’s. Lol. The only other accurate way is float switches. Of course the beauty of all this is it can be setup on the apex. :-)


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