Sounds like fungus gnats.

Ok will they do any harm to my citrus?

fungus gnats, I have a few but I manage to control them with sticky strips. Since using a very coarse 5:1:1 mix I don't get them much anymore. The gnats don't seem to like a dry environment so I make sure my plants dry out well before watering again. I am no citrus expert for sure, but I do believe is the population gets large they can be a problem.

You can spray neem over top, but I've found these work very well..

Dww we were typing at the same time! Nice contraption!

Typically, any tiny flies originating from indoor plants will be fungus gnats, not fruit flies. And they are usually present because the potting soil is excessively moisture retentive, which is the condition they prefer for laying their eggs. And yes, if the infestation is serious enough, the larvae can do damage to plant roots.

Generally, a 5-1-1 or gritty mix will not hold excessive moisture and the gnats will not be a problem. Repotting from a peat-based potting mix to one of these will help. As will a thin layer of coarse sand on the top of the soil surface - the adult gnats will not lay their eggs on this material. Watering with a dilute solution of hydrogen peroxide will kill off any existing larvae and the sticky traps are great for collecting adults.

Problems with fungus gnats is almost always attributed to a watering issue - either too frequent watering or a soil mix that is not fast draining and/or too water retentive.

I use the 5-1-1 mix.. 5 parts reptibark, 1 peat moss, 1 perlite. I water only once a week. Except that I only use the 5-1-1 mix for my yuzu and mandarin trees. I use stagreen potting mix with some reptibark amended on my sudachi tree and the gnats originated from there and spread to my yuzu and sudachi who are in the 5-1-1 mix. I only see a few in my 5-1-1 mix but there are many in my stagreen mixed citrus.

Anyways I put up a sticky strap right next to them and its been 4 hours and still nothing. Smart damn flies... So let me try this: water with 1 tbspn insecticidal soap mixed in with 1 quart water and wait like a day and then apply coarse sand on top. Can I water one gallon right after applying the insecticidal soap? Or will the soap get washed away if I water right after it ?

insecticidal soap is a contact insecticide and really only effective on soft bodied insects, like aphids or mealy bugs. You will get better larval control using the hydrogen peroxide. And both the sticky traps and the layer of sand will help.

Alright I will get hydrogen peroxide tomorrow. Btw how does this look. Only thing I'm worried is that since I added more stuff on the surface that it might cause root rot.. could that happen?

? Anyone?