Through Authenticate 
1. Water purification, moss prevention, no poisonous. can be used at big or small fish ponds, aquarium, lake, fish tank etc. Good for indoor or outdoor.
2. Beautify the environment. DIY can add more pleasure and joy to your life. Eat safe and healthily.
3. Fish and plants live in symbiosis, saving cost.
5.Jigsaw puzzle shape, the cultivated area can be large or small as you need.
6. Product size: 14x14x6.4 cm N.W.: 30g /pc
Material: PE foam+ PP plastic
