Seachem Glass pH Checker - Seachem

The Seachem pH Checker is a glass monitor designed to track pH levels and CO2 concentrations in pl...

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Product Information

Full details

The Seachem Glass pH Checker is designed for planted aquarium enthusiasts who need a reliable, passive method to monitor CO2 and pH levels. By providing a clear color-coded visual reference, it helps users optimize plant growth and prevent chemical imbalances; however, it requires precise placement away from direct CO2 injection sources to ensure the displayed readings remain accurate to the overall tank environment.

All features

BrandSeachem

Extended Product Information

FAQs

How often should I change the indicator solution?

It is recommended to change the indicator solution every 2 to 4 weeks or whenever the color transition becomes difficult to distinguish.

Does this device work in saltwater tanks?

No, the Seachem Glass pH Checker is designed specifically for planted freshwater aquariums.

Can I use any pH reagent in this checker?

It is highly recommended to use the Seachem-provided indicator solution to ensure the color transitions correspond accurately to the intended pH ranges.

Why is my checker turning blue?

A blue color indicates a higher pH and lower CO2 concentration, suggesting your plants may need more CO2 supplementation.

What is the best way to clean the glass bulb?

Remove the device and rinse with lukewarm water. If algae has built up, you can use a soft brush or a mild bleach solution, provided you rinse it thoroughly with dechlorinated water before returning it to the tank.

Troubleshooting

Indicator solution is not changing color

The solution may be expired or diluted; replace with fresh indicator solution and ensure the air pocket is correctly maintained.

Checker is showing inaccurate high CO2 readings

Ensure the device is not placed directly above or immediately next to the CO2 diffuser, as this will lead to false-positive readings.

Indicator solution leaking into the tank

Ensure the device is kept perfectly vertical and that the funnel is not angled in a way that allows the solution to spill out of the bulb.

Pros and Cons

Pros

  • Elegant, unobtrusive glass design
  • No batteries or power supply required
  • Instant visual feedback on water chemistry
  • Easy to clean and maintain

Cons

  • Reading color transitions can be subjective
  • Requires periodic replacement of indicator solution
  • Fragile glass construction requires careful handling
  • Not a replacement for digital pH meters for high-precision needs

Setup, Compatibility & Care

To install, hold the device with the funnel facing upward to fill the bulb with the provided indicator solution. Once filled, invert the device to ensure the funnel side remains down, trapping the air pocket. Secure it to your aquarium glass using the included suction cup, ensuring it is submerged at a depth that allows for clear visibility. To maintain accuracy, the indicator solution should be refreshed every few weeks or whenever the color begins to fade or lose its clarity. When cleaning the glass, remove the device gently to avoid breakage and rinse with clean water, ensuring no soap or chemical residues are introduced to the aquarium environment.

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