Hello .. First, thing to do is check with city for permit requirements and apply as nessesary
An electrical contractormay be needed
Second, If no permits are required All power wires must be in conduit 1/2''-to 3/4'' as needed
all connections must be made in weather proff boxes with gaskets on covers,and silicone on extra hole plugs
Sub panels not required unless no space is left on Main panel, (A double pole breaker 240 volts for pumps )
and a (singlepole breaker 120 volts for lights)
2 pumps and an air blower and heater=30 amps breaker---1 pump only =20 amps breaker,all motors have
the horse power and amps it pull on a sticker
8 gauge wire = 50 amps
10 gauge wire =30 amps
12gauge wire =20 amps
14 gauge wire =15 amps
use #14 for lights=15 amps or upgrade wire and breaker as needed
use WATTS x#of lightsdivided by 120volts=amps breaker size. (do the same with 240V equipment)
bury all conduit at least 12 inches for 120 V
and 18 inches for 240V( I know ...a lot of work)
all timers, lights,air switches,and other controls you must supply unless you add them to your contract.
And above all>>>>>>>> BE SAFE>>>>>>>>>>somehelp