Progressing eutrophication of waters causes the experts to try and find efficient methods
of stopping the process. Counteraction against
eutrophication means first and foremost reducing
the water pollution. Sometimes, however, cutting
off or limiting the input of nutrients to reservoirs
is not enough to improve their water quality. To
achieve that, more and more often, attempts are
made to restore degraded reservoirs (Konieczny,
PieczyĔski 2006).