only use classic knots in projects like my crochet blankets, when i want to join in the middle of a row. i leave tails which i then hide separately within the stitches on each side.
well just now i joined a new ball in my sweater doing one stitch with the 2 yarns, and i don’t now exactly how but i managed to increase a stitch right at that point. i realized many rows later so i hope i can close the hole later weaving in ends. and i though i had this “joining a new ball thing” under control!
it’s easy to do. the trick there is remembering that those two 