UV Light.

[markado]

if there what i think they are, there not very bad for fish, but of coarse u dont want them, they breed in filter most times, i had them years ago an when i would feed they would start to come out of filter jets swim around ea,t then they all where gone when food was, they eat the fish food. when i cleaned filter i found a ton of them.

hey USMCtanker. Mine is like super small worms which crawl on my the glass. Ill be getting a UV sterilizer later!

 

[USMCtanker]

hey USMCtanker. Mine is like super small worms which crawl on my the glass. Ill be getting a UV sterilizer later!

oh hmm, never had those. i had these little sperm looken things, lol

 

[markado]

oh hmm, never had those. i had these little sperm looken things, lol

Yours sounds sick. Is yours a marine tank? i remember last time i use to have worms growing inside my sand bed.

 

[aclockworkorange]

The worms are most likely harmless planaria. Are they attached to fish at all? In that case they would likely be anchor worm.

Not trying to be a jerk, but why are you guys giving advice/input on things you have no idea about? Planaria are really common and anyone with some familiarity with the hobby should know about them. Just sayin, people come here for solid advice from people who know what they're taking about...