ph buffer 7 300ml & ph buffer 4 300ml growth technology free 100ml formulex

These pH buffer solutions are excellent and very accurate. I use them to calibrate my pH probe in my aquarium, and they work perfectly every time, ensuring precise readings. The 300ml bottles provide plenty of solution for multiple uses, and the free 100ml of Formulex is a nice bonus. I’m deducting one star because the delivery took longer than expected. However, the quality of the product itself is top-notch and does the job exceptionally well. I would definitely recommend it to anyone looking for reliable pH calibration solutions!

Good item at a good price it does what it says on the bottle for my blulab ph pen

Excellent service, very good product, will buy sgain

Tested the ph of the acid, with strips=Nearer pH5. Use the whole bottle in about 50L with no visible effect.

Regular calibration of any pH meter with accurate buffer solutions is esssential for getting accurate pH readings. These buffers are supplied in sensible black plastic bottles and the solutions have different colours (pH 7 is green, pH 4 is red) to avoid mix-ups. Much easier than dissolving up powders to prepare your own solutions.

Cheaper than others works well with Bluelab pen.

Arrived on time and securely packaged.Easy to use and colour coded so you cant mix them up.Calibrated my PH meter and appear to be 100% accurate.

Good seller