Bubbles on heater

[chavis.jermel]

There is a small layer of bubbles around the bottom of my heater. I unplugged the heater and they didn't go anywhere so I plugged it back in. Fish don't seem too be bothered. Has anyone had or seen this problem before?

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[Mebbid]

Pictures?

Do they reform when they get knocked off?
Does there appear to be any moisture inside the heater?

 

[chavis.jermel]

They do seem too reform when knocked off and I took out filter doesn't seem too be any moisture or water in it

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[chavis.jermel]

Pictures?

Do they reform when they get knocked off?
Does there appear to be any moisture inside the heater?

couldn't get a good picture don't have the best camera

Sent from my HTC Desire 626s using Tapatalk