Not sure I would want to power a micro-controller off the same power supply I am switching a pump and fan motor off of. I would have reservations about the pump. I would likely power the 12 volt loads off a dedicated 12 volt supply and power the LEDs and micro controller off a dedicated 5 volt supply. I would also lose R1 through R4 and assume your LEDs are designed around a 5 volt supply.
Ron