Try a farm co-op and get AlSO4 aluminum sulfate (Iron content does NOT matter)...400 pounds of alum and 200 pounds of Hydrated Lime (Calcium Hydroxide) will make sure it clears. Almost every "city water" treatment plant has used alum at one time or another to clear drinking water...it's safe.
Turn off your aeration while treating and leave it off overnight after treating...apply the alum slurry first, followed by the hydrated lime application...
