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How can that be done? For the last 20-30 years strenuous efforts have gone into trying to keep fine sediment out of the lake. These efforts have yet to show a long-term improvement in clarity, although the rate of decline has slowed during this time. A strategy worthy of further exploration is restoring the native food web of the lake. The food web was devastated in the 1960s when the Mysis shrimp was introduced and immediately decimated the population of native Daphnia or “water fleas.” Daphnia are recognized globally as an indicator of high water quality, as they filter out the fine particles and algae directly responsible for low clarity. What has happened to clarity since January 5? As expected, with the return of the “upwelled” water back to the bottom of the lake came the return of the usual surface water, and clarity dropped by 60 feet by January 10.