Glyphosate does work pretty well, but I hesitate to use it anywhere near my fish ponds. I do use it, however, out away from the ponds, but there's still lots of weed trimming to do in places where I can't take a chance on run-off killing the fish.
I did write a scathing report to Amazon about the Grass Gater 0.105. I didn't ask for a refund, but Amazon on their own did send me a full refund. I suppose they do actually read reviews. I did get some Titan .105 from them this week, and it works great! I haven't waded off in the the Bull Weed patch with it yet, but if the .108 proves too weak, I'll be getting one of those heads like ArylA uses with some .155.
I'm thinking, with the great suggestions above, my problem is near 'whupped'.