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    Tunze 3155 ATO debacle

    Ok i have a tunze ATO 3155 and purchased the PM650 kalkreator , my problem is that the ato pumps RODI into the kalkreator the reactor pumps kal up to my sump even with two air line check valves the kallwasser reactor stills backs up into the RODI reservoir the ato pump in the reservoir pumps up...
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