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Is the fake rock in the Fake Rock Instructional (by Whitney05) safe for making a waterfall?


I have 10 gallons of water in my hermit crab aquarium and want to use one of the water filters to make a waterfall. However, it will be difficult to find and work with real slate. Will running water damage the fake rocks? Will the chemicals in the rocks contaminate the water? I love the polystyrene and expanding foam idea but I am wondering whether there is a more natural alternative for the outer layer?

 
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Whitney05 profile image63

Whitney (Whitney05) says

7 years ago
fritteritter profile image93

fritteritter says

7 years ago
working