Oh, they say that's pretty common. Mine hasn't had that problem. I think its probably because mine soaked for a while. Even though I did it wrong, it seems to be working out well... Glad you're seeing good results. I haven't seen much in my tank, but its much harder to see growth in a 125g as compared to my 40 or your 10. I know they're growing though, since my ludwigia is about 15" tall now with 4-5" runners coming off the stems in all directions.