Most currently approved ...

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Most currently approved pesticides are biodegradable or chemically reactive in the environment. So, if you prevent inputs and wait, they will eventually disappear. If you have a legacy problem with highly chlorinated persistent pesticides like DDT or cyclodienes, they are very likely to bind to natural particulates and sediments, so having green zones around the water body  to catch run off, and even routing the water from the  pond thru soils or other granular media should help a lot. Many of them may be still collected in the sediments so don't disturb them. Of course everything depends upon the specific pesticides and the local environment, and of course, trying to reduce new loadings.

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Hi Trudi; Joe covered most of the bases. The glycol phosphate compound is a difficult one. That is why an RNA microbe is required. Please review the U.N.E.P. Listing on compounds eliminated through the use of Archaea. Zero residue.  That is an A to Z listing. The short list of the worst have become known as "The Dirty Dozen"  If you do not have a copy let me know.

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