I would suggest you try to contact Olin's drinking water sanitation people directly. I know that they've done some research in that area. You might also want to check how other areas of the world do what you are doing. I believe it may be common in some parts of Australia.
I'm not sure why losing 8% strength in a calcium hypochlorite would be a problem however. Also, I don't understand how you are mixing a carbon filter with chlorine. Carbon filters remove chlorine.
I'm not even sure why you are chlorinating. If you are actually doing sub-micron filtration, I'm not sure what the point is, unless some avian virus endemic to your area can be transmitted in bird feces.
Sincerely,
Ben Powell
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