Pay in 4 interest-free payments of $4.84 Learn more
Ships within 48 hours · Estimated delivery Sep 7 - Sep 12
Suitable for hydroponic
alongside a ceramic shaft and bearing
Add exactly three drops of pH Test Indicator
Protect them from drying air
The indicator solution covers a broad pH range from 4
General Hydroponics 1500 PPM TDS Calibration Solution Seedling Trays & Domes Suitable for hydroponicMaintain reliable nutrient readings with General Hydroponics 1500 PPM TDS Calibration Solution. This precisely prepared reference solution is designed for calibrating compatible TDS and conductivity meters used to monitor hydroponic reservoirs, fertilizer solutions, source water, and irrigation systems. Regular calibration helps growers identify inaccurate or drifting meter readings before they lead to incorrect nutrient concentrations. The 1500 ppm
