DIY Frag plug mold

thingiverse

Make your own frag plugs! Use this mold to cast your own cement frag plugs and start fragging coral. Every plug has a 4-part mold for easy release so you don't have to use release agent and won't add harmful toxins to the water. If you want to have the hole and pattern in the plug, print the stamp and then, when the cement is al little more dry press it in and then again in a 60 degree angle and let dry. When the plugs are dry after about 2/3 days let them cure in some water for about a month until the ph stops rising.