Fully cycled for just shy of 5 months 10 gallon. 4 embers 3 females and 1 male. This one laid eggs last month but all were eaten. Also have 4 neons of which 2 are females who have laid eggs twice in the last 5 months. 1 assassin snail. Parameters are 0 ammonia 0 nitrites 10-20 nitrates gh4 kh5 ph7.8 checked every week before 35% wc and 50% gravel vac. I use api liquid tests. Please tell me it’s just a scratch. She had it a couple weeks ago but it seemed to get better but now it’s back same location. She eats and swims and acts completely normal. None of her tank mates have any marks either.