I was in bunnings today and looked at a 4 way 240VAC power board that has an in built electronic timer. Each of the 4 power outlets has 4 programmable on/off times. This is great for lights, moon light and I was thinking of putting my air pump on, only at night. It must be built just for Aquariums

Now for Baldy and DIYJ if your reading we should look at maybe hacking this unit to provide a 1wire 240VAC switching unit. The unit itself would already have the 240 switches (Triac ?) and the electronic timer somehow triggers them on/off. So I was thinking all we may need to add is 4 x opto isolator and turn the opto on/off from a 1wire output...All very safe and effective...who's going to buy the first one and open it up...? they are only $25.00