It's difficult to say without seeing pics, but you might have fungus gnats. Do a google search and see if the images that come up match the insects you have. If so, try mosquito dunks. You can get these in most garden centers and find some which are certified organic. Put a dunk in a watering can and let it sit for a few days. Then, use that water to water your plants. Also, check your bag of potting soil. That could be where the fungus gnats came in. It's becoming more and more of a problem in bagged soils.

Tepid chamomile tea works great for fungus gnats, which is indeed what you have. Just make the tea, let it cool off, and water the plants with it. Do it three days in a row, and that should take care of them. Nontoxic, easy, and cheap.

The adult (flying) gnats lay their eggs in the potting medium, and it is their tiny opaque larvae which do the damage to the plants. Control should include the larvacide (the mosquito dunks), allowing the potting soil to dry out between waterings, improved air circulation, providing a potting medium that is porous enough to discourage fungus gnats in the first place.

If you use the mosquito dunk solution, water just as you normally would, only less frequently to allow for some drying in between. Use for a month or so.

There is nothing in your Ecosmart stuff that will control the larvae. Save it for other uses.