I got a new philodendron hastatum a week ago and put it outside in a shady area. When I potted it, I put imidacloprid in the soil to head off any bug infestations. Last night was going to be in the 40's, so I brought the plant in the house. I noticed some tiny tan colored bugs on it that looked like they might be aphids, but they were running around on the plant. I've never seen aphids move that much or that fast, so I don't know if that's what they are or not. This morning the bugs weren't running crazy like they were last night, but they are actively walking all over the plant and I saw one in the soil as well. Do you have any idea what these bugs might be? If they're not going to be harmful to the plant, I don't want to spray it with insecticide. But if they are harmful, I do want to spray it.