Q. Air bubbles from Pollen Glass became coarser. Is it due to failure of Pollen Glass?

A. Clogged diffusion filter is suspected. Soak the Pollen Glass in the solution of glassware cleaner Superge. If no improvement is observed even after cleaning with Superge, soak the Pollen Glass overnight in vinegar and then rinse well with running water before reattaching it to the aquarium.
If you scrub the diffusion filter with a brush, etc. during cleaning, the diffusion filter may get scratched or damaged and can result in coarser air bubbles. Be careful of the handling of diffusion filter as it cannot be replaced or repaired.(“Cleaning of Pollen Glass” on YouTube)

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