I fished around rocks the other day with weightless worms using a M power rod and 12lb Seauguar Senshi Monofilament. I broke off at least 5 fish on the hook set, so I need heavier line. The line was extremely frayed as well. How heavy of monofilament should I use? Many disadvantages with heavier monofilament? Don't recommend Fluro or Braid, I don't like either of them.

I've not used that monofilament. When I do use mono I use Trilene XT. I think 12# XT would be heavy enough for your application. Anytime you fish in rock or wood make sure you check your line regularly. Even the most abrasion resistant lines will need to be retied often in some spots.

I've not used that monofilament. When I do use mono I use Trilene XT. I think 12# XT would be heavy enough for your application. Anytime you fish in rock or wood make sure you check your line regularly. Even the most abrasion resistant lines will need to be retied often in some spots.

X2 - exactly the line I'd recommend... 12 should be about right too --

Fishing around rocks you have to constantly check your line for any signs of wear.  There's no silver bullet or magic mono to fix that.  I'd keep fishing what you're fishing, just check the line often and retie as needed.  

Fishing around rocks you have to constantly check your line for any signs of wear.  There's no silver bullet or magic mono to fix that.  I'd keep fishing what you're fishing, just check the line often and retie as needed.

Bingo. When I find that I'm having issues breaking off, it's almost always that 1) I'd fished through snags/fish/cover without checking the line for scuffs or 2) I tied a **** knot and it came undone. If you check your line and make sure you're tieing good knots, you'll alleviate this 90% of the time regardless of whether you're throwing 30lb Yozuri Hybrid or 6x tippets. We all hate to admit it, but user error accounts for 90% of what goes bad on the water.

I usually use a tougher copoly around those rocks such as McCoy Mean green or Hi-Seas copoly. A good option for a monofilament would be Sufix Siege. You just have to be wary about the memory of the line.

Check your line/knot every 15-20 casts regardless what line you are fishing. 

I fished around rocks the other day with weightless worms using a M power rod and 12lb Seauguar Senshi Monofilament. I broke off at least 5 fish on the hook set, so I need heavier line. The line was extremely frayed as well. How heavy of monofilament should I use? Many disadvantages with heavier monofilament? Don't recommend Fluro or Braid, I don't like either of them.

 

Use Fluorocarbon, lol. Seriously, though.

YOU DONT' LIKE FLUOROCARBON OR BRAID??????? I think I long 20# fluoro leader with a good FG knot could solve your problem. Going direct with 20# braid could also do it, although a leader will make your worm look that much more realistic. It couldn't hurt to try.

Spinning or baitcast?  If a baitcast, I'd suggest something like Izorline Platinum or P-Line CXX.  I like 12#, but 15# would probably be better in your situation..  However, these aren't the best lines for use on a spinning reel.  Tough, abrasion resistant lines are stiffer and have more memory.  Not an ideal situation for a spinning reel.

Spinning or baitcast?  If a baitcast, I'd suggest something like Izorline Platinum or P-Line CXX.  I like 12#, but 15# would probably be better in your situation..  However, these aren't the best lines for use on a spinning reel.  Tough, abrasion resistant lines are stiffer and have more memory.  Not an ideal situation for a spinning reel.

true. gotta stay light with spinning reel mono but baitcasters generally hold heavier.

Copolymer would be a good compromise in your situation. It handles like mono for the most part but with more abrasion resistance. Check you line often as well. No zebra mussels in this lake is there? If there is then it's just a way of life and you'll have to get use to it. 

I'm a big fan of suffix siege. I use it in 12lb and 17lb, both on baitcasters.