Hey All, sorry for no pictures, but I can update this thread when it comes back (just finished cleaning and forgot to take a picture). On that Facebook forum that folks recommend here for dino treatment, it was originally identified as dinos a month ago and it called for a silica treatment and adding some phytoplankton for biodiversity. As of late though, I have noticed a very thick carpet of brown that can easily be flipped over and maintain its shape on the sand, and also on my snail. When it comes back, I'll post pictures, but I wasn't sure if this description of a contiguous, thick layer of brown on sand still sounds like dinos or something else. Thanks in advance!