I want to get a few eels to add to the 135 gallon. I want them to stir the sand so I don't have to. I was thinking about a tire track, a fire and a peacock. Does anybody have any suggestions, comments, tips or information that would help? Other eels that I'm not mentioning that would be better choices?

if i was you i would look at the peacock eel as that is the smaller of the eels you mention if you do get an eel be very carefull as they are susceptible to bacterial and fungal infections so if you see any wounds on them they need treating a.s.a.p also they need good water quality, you will also have to make sure the tank is well covered as they can and will escape and any tankmates must be bigger than there mouths otherwise they will eat them its also a good idea too see them feeding before you buy one