London (change)
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12/05/2014 at 22:49

I have a pond on the plot - it's a sunken bath , just removed a load of algae from it last week, noticed a load of bubbles too  - must be the oxygenating plants as I do not have any frogs.

14/05/2014 at 22:38
Thanks Bruce. I do have a lot of plants in mine so I'm thinking it's them causing the bubbles too.
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