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Thread: Apex Newb - ATK Help

  1. #1
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    Apex Newb - ATK Help

    I just installed an Apex on my system (very new to aquarium controllers). I want to have my RODI feed a small (3.5 gallon) ATO reservoir under my tank and for the Apex to control the level and feed top-off water a couple times a day to the sump. I will regularly monitor TDS as I know salt creep may be an issue. I don't even know what control questions to ask to get this done and what parts I need? I would also prefer to minimize drilling holes in the reservoir for float valve(s). Any advice on what I need to safely accomplish this? Thanks in advance.

  2. #2
    Frequent Contributor zombie's Avatar
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    If you have the ATK, you could just add two more optical sensors unless you are using those ports for flow sensors. You would want to start of with a code something like this. Replace switch names to match yours and replace XXX:XX with 1.25 to 1.5 times the time it takes to fill the reservoir with RODI (assuming that number is less than 12 hours otherwise ignore the when statement). The code I show for the ATO is what is auto generated from the task, so you can use the task and get the same result if that is easier for you.

    ATO
    Fallback OFF
    Set OFF
    If LowSw OPEN Then ON
    If HighSw CLOSED Then OFF
    When On > 005:00 Then OFF

    Reservoir
    Fallback OFF
    If ResLow OPEN Then ON
    If ResHigh CLOSED Then OFF
    When On > XXX:XX Then OFF

    You might be an engineer if...You have no life and can prove it mathematically.

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