this thread answered everything for me but...
i've heard so much good stuff about the heat/salt treatment for ick but i've never tried it myself. i usually am able to get everyone into a Qtank in time and treat with meds (read usually as twice over a loooong time) and it works fine. now, however, i'm in a similar situation - heavily planted tank that i can't remove all the fish from. at this point, i have like 30 guppy fry all about a week old and several rogue ghost shrimp that are proving impossible to net. i'd like to do my best to keep them amongst the living.
yesterday i noticed a spot on one of my female guppies that looked slightly like the ick i'm used to but was really really tiny. now i'm seeing tiny spots on another one, but it looks more like a powder grain, not even as big as salt or sand, which was the size of ick on the goldies i previously had. could this be ick too? is there anything else that can cause such a slight spot of discoloration? and if i treat the tank with the salt and heat method, will my guppy fry (and the ghost shrimp as well) survive?