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Thread: daisy chain two tanks for auto water change

  1. #1
    Join Date
    21.05.2019
    Posts
    30

    Default daisy chain two tanks for auto water change

    Is it possible to daisy chain auto water change function. That is, I would like to have the waste water from tank 1 to go into tank 2. On tank 1, I already have auto water change programmed and working using two optical sensor and two neptune pmup plugged into the powerbar. On tank 2, I would like to use another pmup to pump out the same amount of water as tank 1's waste water, so that tank 1's waste water can be directed into tank2 instead of the drain. I currently have 1 optical sensor on tank 2 for ATO. I suppose since both tanks would be using the same neptune pmup to pump out waste water, I can just plug both pmup into the same powerbar socket. So that when tank 1's AWC switches on, as tank 1's pmup pump waste water into tank2, tank2's own pmup is pumping same amount of water out into the drain. Since both are using identical pmup, there should be roughly the same amount of water being exchanged. Seems ok logically, but somehow it seems a bit haphazard on the fact they're identical pumps. If I set up tank 2 with two optical level sensor, is there a safer way to program this daisy chain awc ? thanks

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  2. #2
    Join Date
    09.11.2017
    Posts
    1,484

    Default

    Hi,

    you could use a level sensor with operation mode return pump or one or two level sensors with inverted signal and operation mode ATO (with one or two sensors). The pump then needs to react to fill water.
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