L196 size?

Larger individuals are territorial to conspecifics however not predatory and able to look after itself with all but the most violent tankmates. Not a good pleco to keep with other similarly sized plecos as the gibbiceps would usually win any competition for food.

Size 450mm (18")

The only fish I see having problems with is clown loachs. if you have enough hiding spots and feeding spots no real problems will occur.

This definatly look like your giby?
http://www.planetcatfish.com/catelog/loricari/glyptope/148_F.PHP

With CL's? Nah you will be OK!

only with other nocturnal bottom dwellers (mainly other plecos), and i dont think CL are

CL's don't have enough in them to really do too much damage to plecos, I wouldn't be worried at all.

unless a pleco tried to swallow them, but i doubt it

I think the most a pleco would do to a CL would be trying to suck slime off, or attacking it for territory, but not swallowing.

lol a predatory pleco would be awesome. and im talking much more predatory than the "vampire pleco"