i went to one of the sites you had suggested i think it may be one of these
Fungus; Body Fungus (True Fungus)
Columnaris: Mouth Fungus; Fin Rot disease; Cotton Mouth disease (False Fungus)
it sounds like lots of things
but i think the first one is like it
they are still eating and they are gasping at the surface.but not all the time
i have
3 mollies
4 tetras
4 neon tetras
and about 18 fry left
loseing fry at about 2 a day now
the colour of the slime on them is greyish
no sores or ripped/rotting fins
my tank is a 3 foot ive had the same filter since iv had the tank and yes i cleaned it out with tank water
the tank might be a bit crowed since my guppy had about 25 fry
the ph 7.0 ph and the nitrate was fine two
i have only been feeding every second day
i had 3 molles
4 guppys
4 neon tetra...
:sad: :sad: ive started to have lots of problems all was well for about 12 months then all of a sudden fish started dieing checked ph all was good checked ammiona levels was very high about 4-5ppm done 25 % water change every second day for a week cleaned gravel up the cleaned the filter...