Related Clues:

• Green organism
• Pool owner's concern
• Aquarium issue
• Unwanted organism in an aquarium
• Fish-tank problem
• Aquarium concern
• Snack for a snail
• Lake plant
• Pool organism
• Slimy aquarium growth
• Aquarium cleaner's problem
• Seaweed and kelp
• Fatty acid source
• Part of many a snail's diet
• Stagnant water problem