bristlenose will be fine in that size tank - I think the point was that the corries kept bumping into the BN? Give the BN enough places to hide out in and that should not be an issue.
Correct,actually all of the fish, the corys, guppies, platies and swordtail kept bumping into the pleco, pleco's food, pleco's caves, etc.. 30G regardless of hiding spots is a small enough tank and otos would be happier I think.







