Can carbon leak out and end up in the tank and skimmer?

[MRCORAL]

Last night I did a water change and before I did it I change my ASM g3 collection cup. I notice it was really back. I did not think much of it until about 2 hours after the water change I check it out and it was like a black power stuff getting suck up. The only thing I can think of is the carbon in the cannaster filter. Is this the case? If so can it hurt the tank?

[SeanT]

Nah, you will be fine.
Always be sure to rinse carbon really well.
Sean

[RichConley]

Its definitely carbon in the skimmer. Dont worry about it.