Yes there is both live and home made rock in that tank. The tank is also about 2 years old so it’s had lots of time to mature. We took special care to make growing conditions for coralline ideal.
for lighting we now have 4x96 PC and 1x250 MH just for the new MH a few days ago.
used to have a 175hm
As for the corals of course I bought them. lol they don’t just appear.
One thing I find is that things like shrooms and just about any soft coral will attach to our home made rock fast then the natural rock. Coralline also grew MUCH faster on the rocks we made then other parts of the aquarium. Now we can’t keep the stuff we put a pump in there only 3 weeks ago and it is nearly covered already.
I would say that we have about 40 pounds of homemade rock and about 60 of natural.
If you look in the pick you can see the two large pieces that we made.
The one on the left is one large long piece and the one on the right with the hole in it is another large piece. Also the one up top also home made. That rock today is nearly 100% covered in GSP now. It took about 3 months for the GSP to cover it.
The pic of the rock on its own is one we just made about 3 weeks ago that is in a tank curing. Coralline is beginning to grow all over this rock already. To help it along I will take a fully covered rock out of my main tank and scrub it with a wire brush in the tank with the new rock to seed it.