Green water of Lake Batur from volcanic sediment, tilapia fish farm

green water lake batur bali volcanic sediment sulfur tilapia fish farm aquaculture aerial caldera lake agricultural runoff aquafarming lake health floating net cage oreochromis niloticus farm cage food business fish species volcano water pollution catchment agriculture polluted fish chemical fertilizer volcanic lake dead fish water contamination drone environmental impact indonesia aquaculture business aquafarm aquaculture industry southeast asia farming rural island water environment responsible farming birdseye south east asia