I am a little new to bettas but I just have a regular classic all blue and black betta in a well kept 7.5 gallon tank. Recently he's had issues with fin rot, which ive given him two treatments with Pimafix to help cure and hes all but good now, just a little raggety at the fins, but i think (hope) it just needs to heal now. But i noticed in the tips of his fins that they are turning grayish and he also has a spot under his head of the gray. I don't think its velvet, but im deciding weither i should give him another treatment. Threre are two snails and a couple tiny shimps in there as well. Help??