Рыбка Kalebs рожает снова! Что делать с больным плавником?

Kalebs fish is having more Babies! just a few weeks ago she had some but the two males ate them all but one! So we took them and put them in our other tank till she has her little babies but her fin on one side is injured and she’s is having a hard time staying up idk what to do for her I feel so bad