If you haven't planned on it already, I suggest running your drinking water (from the pond) through a UV light assembly which will kill any bacteria (and I believe other organisms) in it. These are called for in potable water which is being taken from cisterns; I think they would be a good idea for you as well.

"Live like you'll die tomorrow, but manage your grass like you'll live forever."
-S. M. Stirling
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