I have 3 of them in a 55, had 5 but 2 disappeared. They need driftwood to gnaw on, NLS pellets are also good. A few other suitable species for a 29 would be a BN, clown, or L129. Clown pleco's are also Panaques, and need driftwood in their diet. BN's are algae/veggie eaters, and L129's are more omnivorous (will eat whatever you feed the other fish, not as particular about their diet.)