HYDROS pH 10.0 Calibration Fluid is a single-use, high-precision pH 10.01 reference solution for calibrating aquarium pH probes at the high end of the scale. pH probes need two reference points, and 10.01 is the upper reference — used together with pH 7.0 to calibrate probes for reef and saltwater aquariums, where pH normally sits between 7.8 and 8.5. Key details pH value: 10.01 (high-end calibration reference) Best paired with: HYDROS pH 7.0 for two-point calibration of reef/saltwater tanks Format: high-precision single-use packet Shelf life: store in a cool, dry place for up to 1 year Frequently asked questions When should I use pH 10.0 calibration fluid? For reef and saltwater monitoring, where pH runs high (7.8–8.5), paired with pH 7.0. Do I also need pH 7.0? Yes — nearly every calibration uses the neutral pH 7.0 reference alongside a second solution. For low-pH water, use pH 4.0 instead of 10.0. Which controllers use it? Any HYDROS controller with a Probe Port, such as the Control X3, X4, or Launch. Shipped fast with expert support. Get your HYDROS gear from real reefers at Marine Concept Supply, with setup help when you need it and local pickup at our Wheeling, IL showroom.
