Plugs for Coral Grid holder

Hi, 

these are the plugs which I use for stuff like quarantine, frags, or as you can see in the pictures to grow algae (jokes on me). 

There is also the plug version which has a base which can be glued with cyanoacrylate to your rocks. 
Keep in mind this works great with small frags and new corals. Heavier corals could be a problem. Also keep in mind that corals can fall down when animals like sea urchins pass by.
If you check daily this isn't a big problem. I like this mounting method for small tanks as touching a coral accidentally will not break it.

I printed them out of PETG as this shouldn't release stuff into the water. 

Feel free to leave a like. I would also love to see a make of yours with a picture of your tank :D