Best Supplement for Coraline growth?

[albert_dao]

If you haven't already done so, you might want to get some test kits for Ca, kH and Mg. Getting both of those to the right places will make a pest out of coraline

There's no "magic" product that's going to give you enhanced coraline growth. At best, coraline products are going to give you growth rates that will match those of good water parameters, IMO.