thanks bro comy. that's actually only 3 pcs of live rock, epoxied together. that's an older pic yesterday before i moved the tunze. i already removed it temporarily. yeah facing it against the wall, blows a sandstorm. the least is, you can see some sand starting to move around. facing it up, yeah salt spray quite some. so decided to take it out first and figure what to do. btw, the light here for now is just a CF, still have to get mounts for the maxspect.