Probably gonna need to do more water changes, currently doing water changes twice a week on Mondays and Thursdays about 30%.
After doing a little more research on hole in the head (HLLE), it could be contributed to poor water quality, poor nutrition and carbon could remove the minerals found in water to heal HLLE. Nitrates are fine (5 to 10) in my tank. Currently have been trying to feed the dats off feeder guppies and frozen blood worms. That could be the reason why. Good thing they started to accept chopped earthworms.
Definitely going to remove carbon, put salt and do more water changes at higher quantity.
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