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Thanks Nick. Yeah I don’t think I’ll be putting either of those in my res anytime soon. Lol.If I was doing DWC I’d get either the Bluelab ($600) or Chinese knock off ($300-500) Auto Ph device. They only go one way. Like Absorber our (borehole) water is 6.3 so I’d put the pipe into a bottle of Ph Down, sensor in the res and drips in as required to hit your target Ph of say 5.8.
That they are manufactured/sold by a company like Bluelab which is for large scale farms both hydro and not suggests its fine as long as you’re changing your res out as scheduled.
To lower if you wanted to have an organic flavour to your dwc then driftwood or peat pellets will lower your Ph - maybe that’s what people use with aquaponics fish symbiosis type grow?