So I have this orange/Grey lobo colony. Every single time I do a waterchange, it expells this small amount of "stringy thread" like subtance out of it's tissue, not out of its mouth. It only does it during a WC. The colony has been doing fantastic so I've never been concerned about it, just curious as to what it was/was doing. Well I recently switched from IO to Reef Crystals, and this is what it did after the waterchange. Still though, it is in perfect health, and heads have actually started splitting since.

Click here to enlarge

anyone else witness this phenomenon before? lol