SPS issues?..

[ScubaSteve]

Originally Posted by bkelly

andrew the only think that comes tom mind for me is we just got the doser going

Now there's something... Did you have a kalk swing? Are you doing 2 part or 3 part? Is the RTN patchwork or receding from bottom up? Do you have any large snails or brittle stars the are acting a bit different or "lazy"?

What other changes have you made in the past few days?

From the pictures it looks like patch-work RTN, which to me suggests a rapid drop in nutrients (hence why I asked if you changed the ROWAPhos or are running ULNS) or a toxin. Kalk fluctuations can have the same effect sometimes but normally I see that as bottom up RTN or tip down in the case of high alk in an ULNS.