I want to buy a copolymer line for my topwater rod but what are the advantages? Disadvantages? Is it any different from a good mono?

Try these three: Yo-Zuri Hybrid, Izorline and P-Line

Try these three: Yo-Zuri Hybrid, Izorline and P-Line

X2

X3 all are very good lines

I have used the P-Line brand for years. Great line. I would recommend it to anyone.

I use P-Line CXX in 8, 10, 12, 15, and 25 lb sizes on casting gear. KVD L&L is a must have.

Any line extruded as single strand is rightly called a monofilament. That includes all the various nylon lines, including copolymers and even fluorocarbons. But common usage in the marketplace has confused things. Monofilaments extruded from a mix of different nylon polymers are "copolymer lines". The mix of copolymers are chosen to get particular performance characteristics into the line. If you have a 'quality monofilament' line that you like, choosing a random 'copolymer' line is not going to get you anywhere you aren't already. Personally, I like Izor Line Premium and XXX. The Premium is a hard finish line with good knot strength and limited stretch. The XXX is a softer formulation with a little more stretch that develops less spool memory. They are akin to Trilene XT versus Trilene XL. One big reason I like Izor is the price on 1/4lb spools is very reasonable compared to other "premium copolymers". Another I like is McCoy's Mean Green. It has performance characteristics that I think of as "medium" in all respects, which makes it a good "all around" line.

Izorline Is good stuff! Bought a few bulk spools awhile back, and have really liked it. Give it a shot.

First question is casting or spinning for your top water rod, if it's spinning don't go too heavy. Personally I don't care for the stretch with mono or co poly, I like braid.

I do use p line 20# floroclear for offshore fishing on an Avet and this stuff is plenty strong, have handled medium sized fish 30-80# and bigger, I just limp it out with warm water, then troll it out before you fish.

I want to buy a copolymer line for my topwater rod but what are the advantages? Disadvantages? Is it any different from a good mono?

Advantages: The marketing claim is that copolys are more abrasion resistant are less visible, due to the fluoro component. My experience with copolys is limited to Yo-Zuri hybrid, and I don't believe it's any less visible than than most monos. However, it is significantly more resistant to abrasion, especially from rocks. Sufix Siege is the only mono I use, and that's about as good as it gets without paying an exorbitant price.

Disadvantages: Less soft, and hence more stiff. Nothing that KVD L & L can't cure though.

Actually, only a few copolymers contain fluoro. Most are a blend of nylon.

I used Trilene XL for years. It is a high quality mono, and while it casts beautifully on spinning or casting, it doesn't have the abrasion resistance I wanted. I have tried a couple of different lines and settled on P-Line CXX. I use 6# on spinning, and 12# and 15# on baitcasting. As J Franco mentioned it performs much better with KVD Line & Lure.

Actually, only a few copolymers contain fluoro. Most are a blend of nylon.

Really? You learn something new everyday! Thanks J.