Kind of long post here so bear with me 
First time indoor grower here. I have an auto flower plant that's about 10 weeks old. I'm using maybe 60% ProMix and the rest is coco coir and perlite. I fertilized about a week ago with dry amendments.
I have these tiny white "bugs" that are in the soil. I've only dug down maybe 3 inches into the soil and there's lots of them. I thought they were aphids at first but they're not on the the plant stem or leaves whatsoever. The plant is still growing great and is getting closer to harvest time. They do not seem to be affecting the plant at all. I've tried neem oil and a couple other things but they're still around. I check the soil often for any issues any noticed them about 3 days ago.
My phone unfortunately won't focus enough to take a clear picture of them. My question is this: are they harmful and should I get some nematodes to get rid of them?
Thanks

First time indoor grower here. I have an auto flower plant that's about 10 weeks old. I'm using maybe 60% ProMix and the rest is coco coir and perlite. I fertilized about a week ago with dry amendments.
I have these tiny white "bugs" that are in the soil. I've only dug down maybe 3 inches into the soil and there's lots of them. I thought they were aphids at first but they're not on the the plant stem or leaves whatsoever. The plant is still growing great and is getting closer to harvest time. They do not seem to be affecting the plant at all. I've tried neem oil and a couple other things but they're still around. I check the soil often for any issues any noticed them about 3 days ago.
My phone unfortunately won't focus enough to take a clear picture of them. My question is this: are they harmful and should I get some nematodes to get rid of them?
Thanks