If it is brown jelly the only things i have found that help it are antibiotics.... After reading a thread here i used ciproflaxin and it halted it. In my case i dosed the tank but also took the impacted frags and put in a tupperware(resting in tankwater to keep temp) with a much higher dose. I left them there for three days(changing water and remedicating twice a day).
Previous to that i had zero luck using things like iodine or other commonly mentioned(but rare success stories)