Indoors? Unusual if its aphids. Neem oil would be a great way to get rid of these. Fungus gnats and their maggots are also damaging to indoor plants. The maggots feed on the roots and the tiny black bugs fly to other potted plants to infest everything. You can find many brands of neem (Safer is one) as a spray and its quite safe to consume the leaves a week or two after a few sprays. Just flcking them off or spraying with a strong stream of water will not get rid of them totally. Bugs lay eggs, and some are microscopic and can live in the soil. Neem works two ways, it smothers them as well as disrupts their digestion when feeding on the leaves. Its the safest thing out there now.