So I couldnt find any MarOxy. I did find some Fungus Cure tablets and moved the fish to 10 gal QT tank. During the move the fungus ball dislodged. I put one tab of fungus med in QT tank and will do 2gal water changes daily (I dont have a filter on the QT tank small town usa lacks in emergency tank set up) to slowly clear out fungus meds while at the same time adding Melafix to hopefully help with the healing and repair process. The spiny bone of the anal fin is visible so not sure how successful regrowth will be but keeping fingers crossed.