Related Clues:

• Pond buildup
• Reef clingers
• Plankton components
• Plankton component
• Pond growths
• Pond coating
• Life on the water
• Flora
• Sushi ingredient
• Infiltrators
• Pond scum
• It may fill up your tank
• Seaweed, e.g.
• Pool owner's bane
• Pond greenery