 int en1 = 2; //1 is fill
 int step1 = 3;
 int dir1 = 4;
-int decantpump = 5;
-int fillpump = 6;
+int decantpump = 5; //decants SBR into Effluent Tanks
+int fillpump = 6; //fills the SBR from the GW tank
 int skimmer =7;
-int air = 9;
+int air = 9; //Controls the air pump
 int stir = 8;
 
 
-//This is hte analog pin for depth measurement
-int depth = A0;
+//This is the analog pin for depth measurement
+int depth = A0; //defines depth based off measurement coming from the sensor
 
 //These are other variables set up for calculations
 int x=0;

}
}

//calls stepper function abovre to remove sludge automatically
void sludgeremoval(){
  stepper(6400,1,2);//fills up tube. revolutions, 1st motor, "empty" dir
  stepper(1250,1,2);//empties(was 2500 steps, now 1250). revolutions, 1st motor, "empty" dir


void fill(int lvl, int airadd){//check depth and fill until level is 25gal plus stir
  if (lvl<19){
    digitalWrite(stir, HIGH);//high turns that pin on (if it is set to output), low turns it off
  }
  lcd.clear();
  lcd.setCursor(0,0);
