Bought a bag of barley straw, £3.50 at a pet shop nearby. Doesn't show the weight, about 3 or 4 kilos. Pulled out a bundle, wrapped it in a piece of old net, added half a brick and put it in. There are algae at the bottom, have no clue how much it should be, so am experimenting... Will report. #pond #photography #allotment #straw #barley