That's a GREAT sign to see less spots already. If left untreated you'd see the spots increase till your whole fish are pretty much covered white. So less spots is awesome news! Keep up the treatment!!!
No air stone needed if you have live plants.
There's 3 things your plants will require one of the most common 'mistakes'
LIGHTs, they need appropriate light and not too high end wattage (~1watt per gallon will do) and then a full spectrum, these lights that work very well for plants can be found at your home store from GE, Phillips, Bright effects they'll be labeled with names such as "daylight or Ultimate daylight" and are rated around 5-6500 Kelvin, which is exactly what you'd want.
Then plants need nutrition to feed off of. Some of which are in your water, some of which are introduced via foods and the last bit would be what fish leave behind after they ate. Now some water sources are awesome just like that for live plants; many in the US however are not and you'd see that as slow growth in the tanks or discolored leaf's on plants. If that then was the case, I'd suggest 1x week all in one comprehensive liquid fertilizer (such as Saechems Flourish) - Only exception being Sword plants they'd like to feed off the roots and pref root sticks / tablets (like from nutrafin or API).
The last bit would be your substrate. Plants don't need no fancy yaddy ya substrate as advertised in the fish store; but they do prefer finer gravel over these large pea or peanut sizes gravels to root down well. So ensure you either have fine gravel or sand.
The next to last step then would be: Select plants LOL; here's where I get mine due to lack of resource locally Sweet Aquatics
Feel free to look around my aquarium log here to the left the 2nd tap for some ideas, I hadn't gone in and labeled all plants in all tanks, so feel free to shoot any questions you may have reg this to my PM inbox
And now I'll quit hijacking the ick thread for a plant thread - But YOU asked lol