I second the Intermatic 3750 that was recommended earlier. Here's another option that hasn't been mentioned earlier - the ELK 9200 relay (Amazon Link). The ELK 9200 can control (simultaneously, not independently) two 240V appliances. Basically, all it is just a 60A, 240V relay with a 120V coil. The coil voltage can be controlled by the home automation system of your choice - ZigBee, Z-wave, Insteon, WiFi etc. I use two of these with Leviton z-wave outlets.

If a convenient 120V outlet is not available near your 240V pool appliances, then you could consider the Electric Water Heater Controller Kit (240V) (Amazon Link). Although it is shown with a Belkin switch, the manufacturer will make one with the switch of your choice - including a Z-wave or ZigBee switch.