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Growth Technology Cleaning Solution 300 ml
Growth Technology Cleaning Solution 300 ml – Electrode Maintenance for Accurate pH Measurement
Calibration accuracy means nothing if the electrode surface is contaminated. Every immersion in nutrient solution deposits a thin film of mineral salts, calcium compounds and organic matter on the glass membrane — a film that degrades measurement performance independently of calibration status. Growth Technology Cleaning Solution contains dilute hydrochloric acid formulated to dissolve these deposits without damaging the sensing membrane or reference junction. Monthly cleaning is the single most effective maintenance action for extending probe lifespan and maintaining measurement integrity. Pair with Storage Solution for a complete electrode care protocol.
How probe cleaning solution works at the chemical level
The cleaning mechanism targets two categories of contamination. Inorganic deposits — primarily calcium carbonate and phosphate salts from nutrient solutions — are dissolved by the dilute acid through a straightforward neutralisation reaction. Organic contamination — biofilm, algal residues and protein deposits — is broken down and lifted from the electrode surface. The acid concentration is calibrated to be effective against these contaminants while remaining safe for the delicate glass membrane and the reference junction. The result is a restored sensing surface with unimpeded ion exchange capability, producing faster stabilisation times and more accurate readings.
- Dissolves mineral deposits: calcium carbonate, phosphate salts and other inorganic accumulations that form a resistive barrier on the glass membrane.
- Removes organic contamination: biofilm, algal growth and nutrient residues that obstruct the reference junction and slow electrode response.
- Electrode-safe formulation: acid concentration optimised to clean effectively without etching the glass membrane or compromising junction integrity.
- 300 ml bottle: provides months of regular maintenance — each cleaning session requires only enough solution to fully submerge the electrode tip.
Monthly cleaning protocol for pH and EC probes
Dispense enough cleaning solution into a narrow container to fully immerse the electrode. Place the probe in the solution and allow it to soak for several hours minimum — overnight is optimal for thorough deposit removal. After soaking, rinse the probe thoroughly with clean water and gently blot dry with absorbent tissue. Recalibrate immediately using pH 7.01 and pH 4.01 buffer solutions, as the cleaned electrode surface may produce a slightly different response than the contaminated surface used during previous calibration. Store the probe in KCl storage solution after cleaning — never allow it to dry. Discard used cleaning solution; never pour it back into the stock bottle as dissolved contaminants reduce cleaning efficacy in subsequent sessions.
When cleaning can no longer restore performance
Cleaning removes surface contamination but cannot reverse membrane degradation. If overnight cleaning fails to resolve slow stabilisation, persistent calibration failure or reading instability, the electrode has reached end-of-life. At this point, the glass membrane itself has thinned beyond functional limits or the reference electrolyte has depleted irreversibly. A replacement probe is the only path back to reliable measurement. Regular monthly cleaning significantly extends the interval before replacement becomes necessary — most probes that receive proper maintenance outlast neglected equivalents by a factor of two or more.
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How do I clean my pH probe with Growth Technology Cleaning Solution?
Pour enough solution into a container to fully immerse the electrode. Soak for several hours or overnight. Rinse thoroughly with clean water, recalibrate with pH buffer solutions and store the probe in KCl storage solution. Discard the used cleaning solution after each session.
How often should I clean my pH probe?
Monthly cleaning is recommended for probes used regularly in nutrient solutions. Clean more frequently if you notice slow stabilisation or visible deposits on the electrode. Rinsing with clean water after every individual measurement provides additional protection between deep cleaning sessions.
Can I use Cleaning Solution on my EC probe?
The solution is primarily formulated for glass pH electrodes. It can dissolve mineral deposits on stainless steel EC sensing pins, but consult your meter manufacturer's guidelines for specific compatibility recommendations before use on EC probes.
Do I need to recalibrate after cleaning my probe?
Recalibration after cleaning is strongly recommended. The cleaned electrode surface may respond differently than the contaminated surface used during the previous calibration. A two-point calibration with pH 7 and pH 4 buffers ensures accurate readings after maintenance.