Since these are "armoured" catfish, does this mean they are hardier than the standard bristlenose? I know they grow a lot bigger too, but what size do they get to? Are they like clown loaches in the way that they take forever to get to max size? I also heard they poo a lot, is this true?

Also, what is the cheapest/most common type available? Approx what price are we looking at?

Thanks