Hi

The water in my barrel pond where I have a water lily has got an
unpleasant oily sheen - I think it might be going stagnant. Is there a
chemical I can add to the water to get rid of this? I don't have room
for more plants to oxygenate the water so I wanted to try and find
something I could add to the water to get rid of this film.

Thanks.
--
Lynda Thornton