Not hith....looks like a scrape or chunk taken out from hitting decor.
Would get some hydrogen perxodie and dab the area with a qtip and place back into the tank. Can do this once to twice a day for a week. Check the progression.
Keep updating if it gets worse. Hope it gets better.
Would get some hydrogen perxodie and dab the area with a qtip and place back into the tank. Can do this once to twice a day for a week. Check the progression.
Keep updating if it gets worse. Hope it gets better.









