I'm going out tomorrow and due to the clear and low levels I've been giving my hooklength some thought. I've spooled the mainline with 8Lb sensor but wasn't sure whether to use fluoro or sensor for the hooklength. I normally use a couple of inches of braid but i'm worried about spooking the fish in clear conditions.
Cheers,
Stu
Personaly, having - i think - over the years been through the whole range of hooklength materials, i can't find any that make a noticeable difference to my catches one way or the other.
I gave coated braids a go ( which i'd already used for carp fishing ) after having been cut off a couple of times when fishing one particular swim, once even on the take.
I didn't have to wait long to see the result i wanted, playing a fish i felt a grating on the line, and cringed waiting for the snap, but it didn't happen.
when inspecting the hooklength, the coating was shredded, but it had held which is what i wanted from it, to be honest i doubt whether it would have taken anymore scraping, there are limits to everything.
I tried the coated braid in various colours, in various situations and again saw no appreciable difference in catches, so i decided to hell with it i'll use it for all situations.
To be honest fish see all sorts of detrius on the bottom, and most lines of whatever colour don't stand out to the point that it will spook a fish i think.
More important will be your mainline colour, i use a clear line, because i know from my scuba diving days that a clear line - though still visible in most situations will refract the colour of the background, from which ever angle the fish is looking at it.
Far far more important than that though is a tight line which any fish will feel
whether 3lb or 30lb, really i think this only applies to an older cuter fish that very possibly is on it's own in your swim, a large group of smaller barbel competeing over a bed of bait will largley ignore it, slapping and crashing into each other and anything else thats in their way trying to get to the feed.
If i were you Stuart i wouldn't get overly concerned with hook length colour, and of course at night it's completly irelavent anyway.
The only issue i believe with hooklengths is the material they are made from, with regard to the kind of area you are fishing, i.e rocky stoney bottom, underwater snags, submerged tree trunks, branches etc.
Hope thats has helped you a bit.
Regards
Ian.