madmark285 Posted August 8 Share Posted August 8 Last month I made some caves, below are the pictures: The build thread can be found here: Tiger Barbs on Strike! They demand a cave! What is great about polyurethane glue, you can mix it with moist sand and mold it into object such as the above caves. Very easy to do. If concerned with safety issue with fully cured polyurethane glue, I would suggest a 2 step process. First make the object just using sand & glue. After it has cured, cover the entire object with silicone sealant then pack whatever subtrate you are using around it. So now the polyurethane glue is sealed up and the object is covered with the substrate ie: like the above caves. Thats a win-win for me. 1 Link to comment Share on other sites More sharing options...
Guppysnail Posted August 8 Share Posted August 8 This is awesome. I read your build thread when you first posted it and loved it. It’s good to know you found a failsafe for potential toxicity. 1 Link to comment Share on other sites More sharing options...
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