1st Grow Mimosa Evo Auto

Everything seemed to be going smoothly, then I noticed gnats. I realized the issue as the base under the pot wasn't draining properly and water was remaining there and keeping everything moist, so eventually I replaced it and got the pot onto a steel wired base with a smaller plastic tray underneath to catch run off. Used the yellow pads to catch adults as I tried to read up in a solution - first was to stop watering and let the soil dry up a bit. Apart from this the plant was growing (well??) and seemed to be healthy.