S scstone12 Fish Fanatic Joined Jun 11, 2008 Messages 70 Reaction score 0 Location Kenmore Sep 29, 2008 #1 my sand is turning redish brownish. Bad or good? ..
The-Wolf Ex-LFS manager/ keeper of over 30 danio species Joined May 26, 2004 Messages 11,145 Reaction score 11 Location Kent UK Sep 30, 2008 #2 could be Rhodophyta (red algae), bad!
SkiFletch Professor Beaker Retired Moderator ⚒️ Joined Sep 22, 2005 Messages 14,074 Reaction score 0 Location Buffalo, NY Sep 30, 2008 #3 Cyanobacteria, got a couple pinned topics on that