I'm interested in getting a blue sponge but I was just wondering if blue sponges required any special treatment and if there was a minimum sized tank they could be kept in. Any info would be really helpful.
As far as i know they are a photosynthetic species so feeding shouldn't be so much of a problem.
That said they still require pristine water condtions, high flow and good lighting to survive, also be aware that when they die the realese toxins that can wipeout tanks.