Hi:
it sounds to me that your lion has a mild bacterial infection in the areas where the puffer nipped at the fins.
For future references pufferfish and lions do no mix. Puffers tend to go for flowing showy things like lionfish fins.
What i would do - 2 main things, 1)- ensure your water quality is top notch, what are your current parameters (a few water exchange might be in order) 2)-spruce up the lionfishdiet. Dried prepared foods are not a good long term food for lions(I hope this isn't freeze dried krill) .i would start supplmenting the diet w/ other salt water foods, like fresh gulf shrimp w/ shell on, clams, crabmeat, scallops, squid chunks. i would also enrich the food w/ garlic and selcon/zoecon. You should start rotatin thru the foods every feeding, your feeding schedule is right on. I feel you should not fed lions daily, they are binge eaters and in the wild do not eat daily. So feed a few food items til the fish has a small bluge in its belly and that all. Do no over feed.
Also keep an eye on ths red area if its gets bigger, the fish acts sluggish, or any change in attitude prepare to start treatment w/ a good tissue soluble med-email us back for some suggestions
But first feed the lion better, make sure your water chemistry is spot on, and the fish should heal up and drive on.
keep us informed
frank
