There's lots of controversies around miracle mud. Oh wait isinit that part of this hobby?
I am pretty sure when skimmers first came out, they were probably called devils bubbles or something LOL.
Anyway jokes apart, some people had problem with miracle mud while others had great results. Leng's method has yet to take the hobby by storm but those who have success do swear by it. One thing's for sure.....they can grow rooted macros very well.