Okay so here's what's up, I've been trying to find suitable aquarium decor for so long for my betta tank. The problem I'm having is my boys are ripping their fins on all the hide away cave-things I get. As of right now I'm using pvc pipes because they have no sharp edges and are aquarium safe. Are there any other suggestions on things that I can use in my tank as cave type things? I've even tried to sink a styrofoam cup with no success. I wanted to make a styrofoam playground, but I don't think it would sink. I want to spoil these betta fish, but so far the only things suitable are silk plants and pvc pipes! lol. I would really like do it yourself suggestions, but really I'll take any. Ideas?