HYDROS pH 10.0 Calibration Fluid

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.

At Marine Concept Supply, all sales are final. Due to the sensitive nature of live animals and aquatic products, we do not accept returns or exchanges under any circumstances. Please review your order carefully before completing your purchase. No Cancellations.

If you have any questions or concerns about your order, please contact us at shop@marineconceptsupply.com and we’ll do our best to assist you.

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Return shipping for any approved warranties are not covered and will be subtracted from the approved credit total.

Restock Fees apply to some products, due to their size or a manufacturer policy.Each product with a restock charge is marked online, in the description.

Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right