Nutes With Cloning

Heya,

I've started to use oasis cubes when cloning have the tips are yellowing really fast on the leaves until I get to put it in soil.

My question is, can I add some mild nutes to the cubes when soaking them before putting the clipping inside, or wait a couple days before I add? Can I even add them at all?

Thanks.

are u using a rooting gel or powder?

Rooting gel.