250 ltr Rio Xingu

Looking Vaney, I've been out scouring the garden centres looking for good rocks, I have narrowed it down to 4 so far. I found a black volcanic lava rock very light and pourous, also Cambrian Rock, Various large lumps of slate which give great angles, and un named dark rock similar to yours I found yesterday large pieces, good shapes.

Good news I have found somewhere that can slice rocks for me, any shape any size....they can also drill holes from 0.75"-1.5" up to any depth(rock size depending). In the same yard I also found a stunning piece of rock about 18" long and 12-15" wide, would this could be drilled with several holes. So things are looking up just need to get the new tank and plan it it appropriately.

Looks like the bottom of the Xingu to me. Cool set-up