Right, I'm going to talk a load of s**t here, literally, lol.
My GG's crap is cylindrical and about the thickness of a pencil. It is a couple of inches long maybe. It is usually olive green to brown in colour. The consistency can be quite powdery almost where it breaks up as it is coming out, to completely solid where it falls to the bottom. Even smaller fish pecking at it can't break it up.
The variances in colour and consistency probably come from what it has eaten in the previous 24hrs or so.
I think the more greenery it has had the more powdery they are, and more of the olive green colour, and if it has had a lot of protein as in prawns or worms, then it seems to be more solid and brown in colour.
