Best thing for fungus gnats is BTI which is the main ingredient in mosquito bits.

  For aphids  get some Lady bugs for they munch down on aphids

This peroxide drench isn't working. Ken, how does one use the BTI? Dissolve it in some water? And is that safe for citrus?

https://www.amazon.com/Summit-Chemical-Co-MOSQUITO-BITS/dp/B007RGAL6I/ref=mp_s_a_1_4?crid=3TKI895G69C83&keywords=mosquito+bits&qid=1676656701&sprefix=mosquito+%2Caps%2C178&sr=8-4

BTI is 100% safe and organic.

Another way to get rid of fungus gnats is to put around an inch layer of sand on top of the soil, the adults can't lay eggs in it then . Just remember to wash the salt off the sand first if you get the sand from the beach.

Or if you get the sand from your road after a snow storm you have to get the salt out

Well, that's one down! LOL!

Ken, I jave some BTI because I put it in the outside drains for mosquitos. I like the idea of sand too.