A while back when I watered something that looks like flies would come up see me and go back under fast now I have larvae in my soil killing my plants what can I do I’m in flower and outdoors they look like really tiny maggots
I would scratch in Mosquita bits and water good .total to safe to use.
Diatomaceous Earth allow the soil to dry out a few good times also.
Mosquito Bits work well also as @kellydans mentioned
Is there anything else
These 2 would be my suggestion Growmie.
What can I use as a ph down that is safe
Just about any hardware store sells mosquito bits they kill mosquito larvae. They also kill other types of larvae like fungus gnat larvae which is probably what you have in your soil. Its harmless to people and animals.
They also dont like dry soil. Let your soil dry out more before water. Get some Captain jacks dead bug to kill the adults. You can use it during flower.
I’ve heard sulfur does that but I haven’t used it. I still am using PH up and down from general hydroponics.