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Karim,
Threw dinner plates of coralline algae away. My tanks specialize in growing coralline right now.
Louis,
Basically almost all sponges offered for sale in retail stores are from exposed zones. Those Orange fingers, yellow balls, etc. Have a symbiont in them. Cryptic sponges are almost impossible to collect and ship to market. Difficult to reach and very delicate. You have to wait till they grow out of dark rock sides or coral base rock. Hitchhikers. That is what I have done. Now I don't think we have even experimented with the true cave sponges that have high bacterial symbionts. Those would be awesome. A powerful all in one filtration animal for the captive system. Would also like to get semi cryptic coralline species. Branching ones.
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