Dead nassarius after a WC

[john.m.cole3]

I changed my routine to putting filter floss in the sump baffles when doing a WC. I like to stir and siphon my sand to release any detritus stored in there. The sand looks great. WHITE! The floss was packed a bit tight and made my ATO go off to the tune of about a gallon of water saturated with kalk. Dkh went from 9.6 to 10.

what do you guys think did them in? Nutrient release or alk swing?

 

[donnievaz]

Nassarius are very sensitive to salinity swings.

 

[john.m.cole3]

oh yeah it looks like there are about 8 of em on top of the sand . They haven't moved since last night.