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Nice colors and look healthy although green one looks crowded. I would take them off the plugs and glue either on your rockwork or a piece of rubble. You want them to spread out and grow naturally (horizontal) rather than have them "crown" on a small plug for best appearance and health. Plus, you want them high enough that sand sifters won't cover them up.
Personally, I wouldn't bother trying to bust them off of discs they are already growing on. No point really in my opinion. I would either leave them be and let them figure it out because they look great, or just get a larger disc or tile and set them on that. If you leave them be they are not going to just keep growing upwards, as eventually the skeleton will spread out off of the disc and in time you will never see the disc again.
I usually use two pairs of pliers to break off pieces of the frag plug and most times the coral pops off. Or, an old scalpel or similar instrument can be used. CG from Ecotech works pretty well for me. If the coral doesn't pop off at least you've removed most of the plug and can simply glue the coral/plug to your rockwork. Try it; you probably won't hurt anything if you go slow.Thank you very much for the response. You’re exactly right, I would like them to grow horizontally. I have absolutely zero experience fragging. And recommendations or links you could point me towards?
If you put them on a frag tile, they will grow quicker. Your acans are very colorful.

