White 'threads'

[wilyeo]

Hi, I am new to this hobby. I lost 4 discuses as I believe they were contaminated from all the gravel recently. The new batch I purchased has been okay the past 2 weeks (bare bottom tank now). My concern is, I changed 50% of the tank water yesterday after a week and noticed that there are white 'threads' hanging to the glass of the aquarium tank. What are these and are they harmful?

[Carol_Roberts]

Sounds like some type of tank parasite or worm (cleanup crew- not discus). Try formalin at 1 cc or ml per 10 gallons, 50% water change after 8 hours. Add extra air. . . . and see if that gets rid of them.


p.s. Only one water change for the whole week? tsk, tsk, that's not enough - especially if you are feeding to the point you have scavengers in the tank . . .