       measurevol();
       lcd.setCursor(0,1);
       lcd.print(tank);lcd.print("gal");
+      //digitalWrite(air,LOW);
       if ((airadd == 1) && (millis()-lastair > 300000)){
        digitalWrite(air,HIGH);
        lastair = millis();

    digitalWrite(air, HIGH);
    delay(30000);
    digitalWrite(air, LOW);
    delay(30000);
    delay(30000);
    delay(30000);



void fill(int lvl, int airadd){//check depth and fill until level is 25gal plus stir
  if (lvl<19){
    digitalWrite(stir, HIGH);
  }
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("FILL ");
