A discussion about hitch-hikers...
Had a thought about hitch-hikers normally presenting problems/being a nuisance, but wondered if any of you had experience where the hitch-hikers were a positive addition. Maybe something rare or beneficial in some way to you or your tank, or freebies of sorts.
I got some Subwassertang and maybe peacock moss (?) when I bought a couple fish a while back that had been netted in the process.
How about the rest of you?