how do i multi my bubbler?

ok, iv got 30 lt bubbler with a 1000 lt/hr water pump, heliea hc 100a chiller,,,i want to add just one more bucket to it and im lost to which would be the best way,,,at the moment my water pump is in the bottom of the bubbler pumping water into chiller and then chiller back into bucket,,,every things fine growing well,,in not sure if my pump should be in the bubbler ( may get tangeled with roots later on) but no problem The moment,,,,in just wondering also about change in temp if i add an other bubbler about 6 meters away( with all the pipe),,anyone with some first hand advice would be good thanks