Frogbit (Hydrocharis morsus-ranae) is suitable for very small ponds. The more plant variety the better ... Pond water doesn't need cleaning (different advice applies for fish ponds). It may become ...

Amurs get very large (up to 40-50 inches long!) and are used as an alternative to chemicals for vegetation control. Ashland SWCD also sells Nature’s Pond Conditioner as part of its fish-sale ...