TetraPond® Pond Block®, 4 Count and 50 Count Containers Size:Fifty Pack it provides supplemental aeration which

it provides supplemental aeration which improves the quality of pond water and its inhabitants

All tubing includes insert couplings to connect different lengths easily and securely

all of the filter media is utilized for maximum filtration

turf and shrubs

TetraPond® Pond Block®, 4 Count and 50 Count Containers Size:Fifty Pack it provides supplemental aeration whichTetraPond Pond Block Algae Control helps clear cloudy water and remove algae from ornamental ponds and fountain water. Pond Block is limited for use in backyard homeowner ponds and water fountains. For containerized ponds only. Not recommended for use with live plants. EPA registered.