OK, this is Smart Weed. It's great for fry and fingerlings, but it does freely spread through dropped seeds. It can get invasive, but I leave it alone because of the size of my pond. Also, there are 4-5 variants of smart weed, but they are all kinda/sorta the same.

Your RM43 and the 80/20 should work just fine.

Smart Weed


AL