What type of rocks did you use? It looks like you glued small pieces together. Did you cut the rocks, or just got small pieces?
Very impressive. I like how you have a flow nozzle going into the rock work to provide flow back there.
This is STAX rock by Two Little Fishies. Really cool stuff! [emoji4]
I used Aquaforest Stone Fix and some Aquarium Grade silicone.
Thanks for the kind words... this was quite a bit of work, but it turned out pretty Awesome. [emoji4]