A seed shell that stays stuck on the cotyledons after an indica seedling emerges is usually a sign the seed was planted too shallow or the surface dried out. Misting the shell and waiting an hour lets it slide off with tweezers, but forcing it dry tears the first leaves. Photos showing safe removal step by step, plus how deep to sow to avoid it, are shared on https://kushindicaseeds.com in the germination thread. Most seedlings shed it on their own within a day if left slightly humid.