Seems to be a hard answer to find. What is the best knot to join?

Why do you need to join fluoro to fluoro?  Most people like the Alberto or the uni to uni for joining lines.

Why do you need to join fluoro to fluoro?  Most people like the Alberto or the uni to uni for joining lines.

Because I'm broke right now!! I have backing on all of my reels and I've wondered if I'm using the right knot ( uni to uni). I guess I am, but the knot just seems to be a little large.

Because I'm broke right now!! I have backing on all of my reels and I've wondered if I'm using the right knot ( uni to uni). I guess I am, but the knot just seems to be a little large.

Oh ok, I see.  If the knot is deep enough in the spool that it won't come out in the cast, it doesn't matter so much what knot you use.  You might just try it again with fewer turns if the size bothers you.  

Since it sounds like the knot is not going to come into play. I would use a simple blood knot.

 

http://www.animatedknots.com/bloodknot/index.php?LogoImage=L

Thanks!

x2 with the blood knot. It's small, easy to tie, and hold up well. If it's where it's supposed to be in the spool, it'll never come out anyway.

Blood knots are fun to tie, lol. Blood or a Uni to Uni will have about the same profile and work for you. You could try a triple surgeons knot, but passing the entire spool through the loop might be a pain.

I only do a small uni to uni when tying to backing just a couple of turns. A full knot with heavier line can mess up how your line spools on the reel and make it stack to one side or you feel it with your thumb in a long cast.

Since it sounds like the knot is not going to come into play. I would use a simple blood knot.

 

http://www.animatedknots.com/bloodknot/index.php?LogoImage=L

 

the blood knot is what I use to join topshot to backing.

 

I would trust it if I had to in a fish fight, and its much easy for me to tie

I ended up tying a uni to uni. Thanks for the advice!