I have one that I love and it's doing great now: I always had a love for sponges but those what we can keep in an aquarium are those that are photosynthetic, like the blue haliclona and they do need silicate to grow well. This sponge produce tubular structure up to 5'' tall and it does not do well when Chemiclean is used as it completely bleach and some part or whole die. I think it has a symbioze with some sort of cyanobacterias?

http://i786.photobucket.com/albums/y...psa7eeeaac.jpg

+1

This was a fantastic read, thank you for posting it. I love the seamless colors and shapes of sponges and have always been attracted to their undulating shapes, which is enhanced now that I know how important they are in the ecosystem.

I've been very fortunate to have a multitude of sponges growing in my tank on the undersides of the LR. Pink, orange, yellow, white and deep purple :rockon: :drum:.

Question though, can you get an over-proliferation of sponges?

Those are gorgeous, although everything in your tank is gorgeous, Daniella.