Remove the old filter cartridge

families concerned about lead and heavy metal contamination

Temperature: 2 points

The Milwaukee PRO Photometer is ideal for users in pools

Wait for Stability: Allow the reading to stabilize (typically 30-60 seconds)

GroLine pH 4.01 Buffer Sachets, 20 mL (25 pcs.) WU-S3800MB-TL Remove the old filter cartridgeHI70004G is a high quality pH 4. 01 calibration buffer designed with hydroponics, aquaponics, and greenhouses in mind. Single use sachets are highly portable, with a small footprint and a lightweight design. They are the perfect accessory for your on the go testing, fitting easily into your pocket or carrying case. Supplied with Certificate of Analysis Single use sachets for convenience. Perfect for use with GroLine testers and portable meters!