Hi, is it normal for a baby black moor to have a split in his tailfin? I just got him and two other fantails yesterday and I’ve checked photos, it definitely was not split last night 😔 will my wee man be okay? 😢
If it wasn't split before then no it's not normal. It sounds like he's damaged it somehow, maybe on tank ornaments? Remove anything he may have caught himself on, make sure the water is kept very clean and hopefully it will heal by itself over a week or two.
All I have in the tank is a couple plants and the filter and the plants are too soft to cause that damage, so I’m wondering if he caught it on the filter? I moved it to the middle of the back wall of the tank as opposed to in the corner as he has a habit of swimming up into the corners and he seems to have stayed away from it. In terms of keeping the water very clean are we talking daily cleaning?
Oh dear I'm sorry but 25 litres isn't enough to keep fish in. A tank that small is only suitable for shrimps or snails. It's possible that due to the small size of the tank your fish has fin rot from poor water quality. Do you have test results please for ammonia, nitrite and nitrate?