I forgot to mention this warm weather can cause problems with still water, if this is the case you need to agitate the surface or oxygenate the water have a hose with a sprinkler on it for some time if poss, ponds need some shade, this is why fish keepers use pumps to circulate the water, our pond has seventy fish some large and we have three pumps to brake up the surface also large trees surround it, other wise our fish would certainly die, any disturbance of the surface you can do will help, aland.
