My small 2m diameter garden pond has been getting progressively more sludge like this summer despite my efforts to clear it. Oxygenating plants, barley blocks and a proprietary eco bacteria product. It's so thick and green now that the fish have wade through it. I'm going to transfer the goldfish to a cattle trough protem and empty the pond to clean it and start again.
Anyone have any advice or warnings?
Anyone have any advice or warnings?