DIY cichlid stones

[The boring name]

Could this work? Here is my plan. Just like a background take some styrofoam cut into rock shapes and hollow out. Them take the cement an coat it on the foam and use something to coat it evenly in the hollow area. Any tips or feedback? Thanks.

 

[TheGuppyGirl]

Go to a local craft store or possibly Walmart and pick up some styrofoam spheres and carve them to a stone shape. Coat with quikrete leaving an entrance of course (I'd recommend at least 3 layers) then after it's cured, use acetone to dissolve the styrofoam. Rinse thoroughly. :3


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[The boring name]

Thanks!