Nope. I don't use live rocks that's why. U can see a ugly green algae too. I recently hv done a 50% water change coz of ammonia. U can see detritus also in below pics. I hv hydroids,sponges,more coralline,bristle worms and sphogetti worms,vermetid snails. I am just worried about loosing a coralline algae in one place. Also how can I remove that ugly white colour it is leaving. U can see more pics in my threats. I just keep my mirror and back black background clean coz it gets green algae and brown detritusAre we sure this is 12 years looks more like 12 weeks. Unless you scrubbed off all of the rocks with a brush can’t see how this is possible.