High, i have a 3 gallon pot with a 5 week old plant in it. so far ive only used foxfarm soil with no perlite and the soil has been compacting and i would just add more ( i realise this is bad ) so i need to add perlite. im gonna go 2 inches of just perlite at the bottom and then a little less than a gallon of perlite mixed with the 3 gallons of soil. how should i go about doing this without transplanting because my plant is already sitting in pure soil. and if i do have to transplant, can anyone give me some tips on how to do it