i use the twin doser
i submerged both lines in the mixtures to prefill the lines.
i use a check valve on the outputs of each line I found without one the line would slowly drain and then the next time the doser was actuated it was just pumping air
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250G DD LED SPS R.I.P.
180G LED SPS
80"x36". 300G custom build
Owner of Mountain Ridge Heating and Gas
Class A gas fitter, HVAC
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