3 Penn-Plax Deco-Replicas Realistic Green Grass Hideaways with Swim Through Hole - Decoration For Aquariums and Fish Tanks.  The 4" Hideaway Pipes create a astonishing cave with lifelike greenery.  These aquatic ornaments features a faux moss that adds a unique look and texture to your tank, which provides a hide-away that reduces fish stress and aggression.  These decorations are perfect for all types of fish, along with shrimp, crayfish, and other crustaceans.  Watch as your fish interacts and begins to swim through, around, and above this decor.  The material used is safe for both freshwater and saltwater aquariums. 

SUPER SIMPLE TO CLEAN: Before placing into your tank, or as you as perform regular cleaning and maintenance, simply wipe down and rinse off the ornaments with warm water.  Never use soap, as the residual soap particles can harm your fish MADE OF SAFE AND DURABLE RESIN: Our aquarium ornaments are inspected with your fish’s safety in mind.  The material used is safe for both freshwater and saltwater aquariums.  They also feature a sturdy base that keeps them grounded in your tank.  Adds a unique look and texture to your tank, which provides a hide-away that reduces fish stress and aggression.  DIMENSIONS: 4. 20" l x 4. 50" W x 3. 75" H