Penn-Plax Sinkers Aqua Plants are so incredibly life-like that once they're in the aquarium, you can't tell them from the real thing. Even the roots are realistic, with a specially-designed weighted-base that anchors them in place. They're absolutely safe for fish and best of all, they won't die, rot, or cause any algae problems. Approximately 6.5" long. Note: design may vary slightly.