Before transplanting, you can cut back both the large taproot and the smaller horizontal roots; especially focus on removing any dead or rotting roots. Although aloe is quite resilient about pruning, trim only up to about 1/3 of the rootball at a time (leaving 2/3 intact). Aloe likes to be snug in its pot and should fill the new pot about 2/3 full. After the roots are cut, some people allow the roots to air dry for a day or two, so that the wound starts to heals over a bit before placing the plant in new growing medium; this can help to prevent diseases, etc., from entering through the cuts. If you transplant immediately after pruning the roots, hold off on watering for a few days, to discourage rot. Hope this helps!
Before transplanting, you can cut back both the large taproot and the smaller horizontal roots; especially focus on removing any dead or rotting roots. Although aloe is quite resilient about pruning, trim only up to about 1/3 of the rootball at a time (leaving 2/3 intact). Aloe likes to be snug in its pot and should fill the new pot about 2/3 full. After the roots are cut, some people allow the roots to air dry for a day or two, so that the wound starts to heals over a bit before placing the plant in new growing medium; this can help to prevent diseases, etc., from entering through the cuts. If you transplant immediately after pruning the roots, hold off on watering for a few days, to discourage rot. Hope this helps!