The bubbles on my pool cover have turned white and brittle.

If your solar blanket has become brittle, it means the plastic has begun to break down. If your pool cover is several years old, and both the top and bottom of the cover are affected equally, it is probably just an indication that your cover has reached the end of its life expectancy, and it is time to purchase a new one.

If however, your blanket is only a couple of years old (and still under warranty), there is clearly an environmental factor causing this premature breakdown.

If it is the top of the blanket (the flat side, which faces up) that has become brittle, then it could be sun damage (UV fading). Depending on your brand of pool cover, this is likely to be covered by warranty.

If it is the bottom of the blanket (the bubble side, which sits in the water) has become brittle and / or faded, then the breakdown is generally caused by exposure to high levels of chemicals in the pool.  We’ve seen serious chemical damage occur in a matter of months, so it is very important to keep chemicals down to within the Australian standard.

Does the damage appear to be concentrated in certain areas (ie near the jets), or at one end of the pool? This is also indicative of chemical damage – if the jets are turned upwards, sections of blanket closest to the jets will get a much higher concentration of chemicals than the rest of it.  While you can not un-do chemical damage, you can turn the jets down, to avoid further damage.

A classic example of chemical damage on a solar blanket

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