Growth Technology pH Probe Refill & Storage Solution 300ml - Keep Your Probe Wet, Keep It Accurate
Best for: anyone who owns a pH meter and doesn't want to shorten its life by letting the probe dry out between uses.
Our thoughts
This is the step most people skip, and it's the one that actually kills probes early. A dry pH probe isn't just less accurate, it can be permanently damaged. Keeping a small bottle of this next to the meter costs next to nothing compared to a replacement probe.
Growth Technology pH Probe Refill & Storage Solution is a dilute potassium chloride solution used to keep pH meter probes wet between uses. The glass bulb and reference junction inside a pH probe need to stay hydrated to give accurate readings and to avoid permanent damage.
If a pH probe dries out during storage, its accuracy and lifespan are likely to drop off drastically, sometimes permanently. Storing the probe tip in this solution instead of leaving it dry, or worse, in plain tap water, keeps the internal components properly hydrated and ready to give a fast, accurate reading next time you need it.
How it compares
Storage solution is a small, cheap category, but it's directly tied to how long an expensive probe actually lasts.
- Bluelab's Soak & Store Solution is the closest branded equivalent, similarly priced for a comparable volume.
- Hanna Instruments sells its own storage solution, again a similar KCl-based formula at a broadly similar price.
- Growth Technology's version works across any brand of pH probe, so you're not tied to buying accessories only from your meter's manufacturer.
All of these solutions do essentially the same job chemically - the real differentiator is price and whether you actually remember to use one at all.
Usage guidance
After use
Clean the probe tip, ideally using Growth Technology's pH Probe Cleaner first, then wet the tip in Refill & Storage Solution before putting the probe away.
Between uses
Store the probe with its tip either submerged in a small storage cap of solution or wrapped in a solution-soaked cap or cloth, never left dry.
Topping up
If your probe came with a storage cap, top it up with this solution rather than tap water, which doesn't protect the probe in the same way.
Technical specifications
- Active ingredient: dilute potassium chloride
- Volume: 300ml
- Function: keeps pH probe tip hydrated during storage
- Compatible with: any brand of pH probe
- Manufacturer: Growth Technology
Who this is for
- Anyone who owns a pH pen or probe and wants it to last
- Growers who've had a probe dry out and seen readings go unreliable
- New meter owners setting up a proper maintenance routine from day one
- Commercial growers protecting equipment that's expensive to replace
Our take
Storage solution is easy to overlook until you've already ruined a probe by letting it dry out, and by then it's too late. This is a small, cheap habit that protects a piece of kit that isn't cheap to replace.
Does exactly what it should, day in, day out. Worth picking up alongside the Probe Cleaner so your meter maintenance is properly sorted in one go.
