Aqua Master P50 pH & Temperature Meter Beneficial Inoculants then drain and refill with

then drain and refill with plain water for the remainder of the flush

Worth it if you're running drip

This is a solid

this shifts that problem

Aqua Master P50 pH & Temperature Meter Beneficial Inoculants then drain and refill withAqua Master P50 pH & Temperature Meter Waterproof Dual Function Handheld Tester Best for: Growers who want an accurate, waterproof pH and temperature meter without paying for a lab grade professional instrument. Our thoughts A genuinely useful two in one meter pH and temperature off the same probe, in a waterproof housing that can handle getting splashed or dropped in the reservoir without dying on you. Comes calibrated out of the box, which matters