according to "the horned frog family and african bullfrogs" by R. D. bartlett and Patricia Bartlett on CUTS AND SCRAPES
"these may be of mechanical or bacterial origin. For cuts and scrapes, a mild antibiotic salve, may hasten healing and the removal from the cage of the object causing the injury will prevent re-occurance. Veterinary assessment is suggested for the lesions. The causative agent- which may be a parasite, an infection, or a mechanical injury- must be isolated and identified"
im not sure what they mean by mild antibiotic salve, hope this is of some help and im glad your crabs are doing fine and hope your pacman recovers swiftly.