Some sort of strange RTN event. Help!

[christyf5]

Hi,

I just got home from work today and 5 separate SPS are starting to lose tissue. I have a yellow cap that has a big white spot in the center of one piece, a purple cap that has a whitish spot at one edge, some sort of brown frag (possibly an acro?) that is almost completely gone except for one tip and a pink birdsnest that has a tiny bit of white on one part, as well as a pink acro with yellow tips that is half gone. I can "rescue" (hopefully) some of these by fragging them.

I did add some of that Kents Phosphate Sponge on Sunday and left it in until today which is past the 2 days it says on the container. Does this stuff release more phosphates than it absorbs or something? That is the only thing I have done to the tank lately. The temperature is still running a bit high but is within the temperature range i have experienced in the past 2 months so that is nothing new.

Ammonia = still waiting for the stupid test, takes 20 mins
Nitrate = 0
Phosphate = less than 0.2

Anyone have any ideas on what happened? Ideas on how to save what I have left?


TIA
Christy