I am planning on fabricating a recirculating system for my coop that is currently under construction and have a question about water quality. Is there something that can be added to the water to inhibit algae growth in this type of system? I would think that keeping the tank in a dark enclosure could help slow down any biological growth and that there might be a potable additive that might keep the supply more sanitary. A half tsp of bleach per 5 gallons perhaps?