Buzzing airstone

On these very hot summer days we are having at present in the UK, I leave the door open to the fish house to circulate the air and reduce the air temperature in the fish house to approximately 26 degrees C.

This morning I noticed a buzzing in the fish house, which sounded like a large bumble bee or hornet had got trapped somewhere in the fish house, but with all the pumps, filters, air stones running it was difficult to track down. I spent some more time this evening, and I’ve found the loud buzzing sound is being caused by a large pond air stone I have in a 200l water butt for water changes. The large water butt also amplifies the bass sound.  I’ve reduced the air flow and the buzzing has stopped!

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