Works as advertised. I’m happy with it.

Ph buffer it is what it is

The calibration fluids seem to work properly. No problems.

Simple to use Feel good about the results

Did the Job! As to be expected!

If you're an all grain brewer managing your mash ph is important. These two calibration solutions are essential to properly calibrate your ph meter.

No problems would suggest a larger size

Wish they were NIST rated.

PH meter was probably the best investment for my brewing. Need to have this to keep it the meter in line. Good price and product.

Always keep a set around and calibrate every time you brew. It helps give you a repeatable product.

Just buy it, you'll need it to calibrate your pH meter correctly.

I use this product to calibrate meters I use in my printing business, brewing and pool maintenance.

This is a great price for very needed solutions if you own a PH meter. At the LHBS we have to pay 5 times as much for smaller bottles of PH solutions 4 and 7.

Summary says it all. If you have a pH meter, you should get some.

I gave this 4 stars only because it has a shelf life so if you don't brew too often, take note. For me, the shelf life hasn't been an issue because I usually use up all the solutions well before the 6 months. If you own a meter, you gotta calibrate it often. I do it every brew which is probably the best bet.

I just purge the air out with inert gas such as Nitrogen or CO2 while screwing the cap back on. This will help extend your shelf life!

All pH meters need to be calibrated regularly (heck ANY measurement device needs calibration have you calibrated you hydrometer - you might be surprised what you find!). If you're not calibrating a pH meter with both high and low pH solutions you will not be getting accurate results.

Wish it had a longer shelf life. It is a good size for moderate recalibrations.

This solution has allowed me to monitor ph during my brewday with great accuracy. The 3 month shelf life can be a bit of an inconvenience, but considering you need a decent amount of liquid each time you calibrate the meter, you'll move through the stuff pretty frequently if you calibrate often.

The shelf life of these solutions is only 3 to 6 months, so there is no benefit to buying in bulk. I feel like I have enough that there is no fear of running out, without feeling like I'll be tossing away most of it in 6 months.

Keeps the pH meter honest. I have mine in the fridge, not sure if helps keep shelf life up but oh well.

nuf said, but it here you won't find a better price that works this well.

These are great solutions for any pH monitor.

Keep your ph meter accurate

I bought these to calibrate my Milwaukee pH Meter I had to intialy calibrate the meter. The solutions worked just fine. Super afordable, will be buying again some time in the near future.

Works as advertised and there is more than enough solution to last the few month useful life.