Astralpool SEL BLUE - User Manual

Questions and Answers

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alyssa50Aug 10, 2025
What to do if pH/ORP values are extreme or unstable in my Astralpool Water Filtration System?
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  ralexanderAug 10, 2025
  If you're experiencing extreme or unstable pH/ORP values in your Astralpool Water Filtration System, consider these potential causes. The sensor might be saturated; try immersing it in a hydrochloric acid solution diluted to 10% for 1 hour. Air bubbles at the vessel's head could also be the issue; flush out the measuring chambers while softly unscrewing the sensor-holder and holding the sensor in place. Lastly, the sensor itself might be defective, in which case you should replace it.
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Chelsea ScottAug 18, 2025
How to fix a slow sensor response in my Astralpool SEL BLUE Water Filtration Systems?
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  Barbara WilliamsAug 18, 2025
  If your Astralpool Water Filtration System's sensor is responding slowly, it could be due to a couple of reasons. Some sensors are naturally slower, so allow a few hours for stabilisation. Cleaning the sensor with clean water and shaking off excess (without rubbing) might help. Another cause might be insufficient flow rate in the electrode measurement chambers. Ensure proper water flow and absence of air bubbles by flushing if needed.
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Luis WillisAug 27, 2025
Why is it impossible to calibrate the pH/ORP sensor on my Astralpool Water Filtration System?
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  Samuel WolfAug 27, 2025
  If you find it impossible to calibrate the pH/ORP sensor of your Astralpool Water Filtration System, the calibration solution might be contaminated or outdated; try replacing it. Alternatively, the sensor could be clogged or covered in limescale. No answer.
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Melissa HaleyNov 2, 2025
Why is the chlorine level in my Astralpool Water Filtration System low and won't increase?
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  nroseNov 2, 2025
  A low chlorine level in your Astralpool Water Filtration System that won't increase can be due to several reasons. It could be that the filtering medium is clogged or contaminated, requiring a filter cleaner or replacement. There might be a water balance issue; check the pH [7.2 - 7.6], combined chlorine (DPD3) < 0.6 ppm, stabilising agent [20 - 30 ppm], TAC [80 - 120 ppm], and TH [180 - 250 ppm]. Insufficient filtering time could also be the cause; increase it according to the formula: filtering time in h = water temperature / 2. Another cause might be a lack of stabilising agent, especially with UV exposure or high use; add 20 to 30 g/m3 of stabilising agent (cyanuric acid). Finally, check the electrode connection and chlorine gas bubble production in the vessel, as it could be an electr...