Pond Sludge Reducer Block - 4 pk.

Quicky and naturally keep your pond water clean and clear with Tetra Pond Reducer Blocks. Beneficial bacteria and enzymes go to work breaking down pond sludge. Each block treats 250 gallons. 4 pk.

Contains beneficial bacteria and enzymes.

Directions for use:

Starting and Maintaining Ponds: Use one block for each 250 US gallons of pond water once a month.
Cleaning Dirty Ponds: Use one block for each 250 US gallons every week for one month. After month's end, use once a month to maintain pond.