hey so my severums are showing some abnormal pitting or marks on the "face". on the smaller one in particular I've noticed its gotten worse with some areas whitish but not fuzzy at all. no redness or open sores from what I can tell either, the sensory pitts just look bigger. the tank is a little crowded but I usually do a 30% wc twice a week when possible, I've stepped that up to every other day since I noticed this. any suggestions beyond clean water?