Is it necessary to dig the holes in sand every few days?

I know one of the most common thing that is overlooked by indoor growers is Amount of oxygen that plants get.. One of the main reason many growers turn to aero-hydro water system from soil one.

I'm still on indoor soil system , is it necessary to dig the soil every few days with maybe a knife or something just to make sure there is enough space that plants can breath and oxygen is floating through it? is it good /necessary exercise?

will it hinder plants growth in anyways?

if you do that you'll fuck up the roots. Just add enough perlite to aerate the soil.

I'm using miracle grow mix so didn't get paralite maybe i should get it and mix it up in that case?

yes, cut the mg by half. Also, if you don't over water and allow the soil to dry out somewhat between watering you will be fine.