Hi Ross,
Capacitors in parallel add. Capacitors in series are like resistors in parallel.
Ctotal = 1/(1/C1 + 1/C2 + ... + 1/Cx), or Ctotal = (C1*C2) / (C1+C2) if you only have 2 capacitors. So to recap
, resistors and capacitors are opposites mathematically. Capacitors in series are like resistors in parallel, capacitors in parallel are like resistors in series.