freshwater slugs what is it ?

[downandout]

I was doing a routine clean today moving rocks around etc, to my suprise i have found some little slugs in my tank ( about 10 - 15 mm long ) a milky white colour to light brown colour bodies with two thin black lines running down the backs.
My question is what are they and are they bad for my discus? I figured that have been introduced into the tank via new plants, only one of my tanks have these little critters in it and was the only tank the plants went into..

[scott bowler]

downandout do you think that we can have a pic if you can get one

[DiscusMad]

sounds like leeches to me

[downandout]

ok tried for a picture of these little buggers no luck ( old camera), leeches cool i never thought of that i will have a look around today on the net for some info thank you. Happy tank yesterday 3 dead discus this morning :(

[gingerbeer01]

check your water conditions first - bet you have a problem there.

Steve

[downandout]

The water tested fine. as i had just done a 20 % change, to be on the safe side i did another water test the followind day which also came back clear, i did another 15% water change aswell that day, Nothing has died since. :) I removed all the slugs/leeches i could find aswell.