Christy's 180 build

[christyf5]

Originally Posted by jorjef

I need to hi-jack for a second. In the last photo there is some round pink'ish/purpleish growth on the rocks with round holes in the middle...What is this stuff?? I have some of the same but also grows in long stringy lengths...Seems to be some type of sponge

yep its a lower light sponge, the whitish type seems to get those long strings on them and after a few years if you try to separate your rocks you'll find they're glued together by the sponge. Kind of neat that it secures your rockwork for you but also annoying that there can be so much of it in there. I also have a couple of other sponges in the tank that come in pink and red, no strings but they look sort of the same as well as yellow ball sponges which are really neat