"kathy" wrote:

I can only suggest keep on rinsing.

Kathy hit it on the head, but if you experiment in your kitchen, you
will find that it takes a lot of dilution. If you fill and completely
drain several times, you will eventually get adequate dilution. It is
good to spray with a garden hose and drain before refilling each time.
Don't expect one change of water to fix it. It won't.
--
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18,000 gallon (17'x 47'x 2-4') lily pond garden in Zone 6
Cheers, Steve Henning in Reading, PA USA