The first 24 hours of "hot" weather did it....
.............dead gold fish and emergency action needed. :ohmy:
Over the previous 12 months, despite lots of thinning, the oxygenating pond plants increased. The fish spawned and the pond population soared.
Two days ago a small dead fish was noticed - quite unusual.
We agreed I needed to reduce the pond plants and give more open swimming space just as soon as I had time.
Twenty dead fish (one large one) later the job is done...... it's just a shame I didin't act before. Low over-night oxygen levels had caused the problem....that and me being too slow off the mark. :(
So - take care - keep an eye on your fish and keep the plants under control