hey ryan, sorry i got to this thread late - apologies if this is outdated advice, but here is what i would do, and what has worked in the past for me with lungfishes and similar infection/damage:
- i would bump up the temp to 82F, and you could also add some salt (1 tbsp per 10g water) - basic primitive fish first run treatments.
- keep an eye on the infection, if it doesn't get better then go with the treatment below:
- do the heat and salt treatment, but also take the lungfish out and literally gob neosporin on the infected area. you have to use a good amount (only on the infected area) so at least some will stay on/get to the wound. i have used this on several occasions and it helped every time. this was advice from an LFS i trust from years back. no need for fancier more expensive "fish-specific" treatments that many LFS try to sell.
i would also increase water changes to 50% with each water change, and while the lungfish is still sick (i.e. for now), i would do 50% every other day. lungfishes are quite resilient when it comes to water quality, so large water changes (slight shifts in chemistry) will be ok.
keep this up and the lungfish should be fine. i would also replace the triceratops skull with a regular heater guard...even my big aethiopicus has scraped himself badly on random tank decor.
good luck, and keep us posted on his progress--
--solomon
