hi guys im new to marine aquarium's, and i have just bought a 3ft tank with sump system, im just setting up and calibrating the system i have mixed the reef crystals with me RO Water and filled the tank i now have me live rock in and topped up system just started all pumps skimmmer etc etc all working ok i am not running any lights just a heater and koralia 4 for the first week set heater to 24 degrees c, and running in system, i put a thermometer in the water and it now measures 26.6 degree c, with no lights so starting to worry when lights go on wont that heat water up to above 29.0 degrees any idea what to do to bring temp down to around 24.5 to 25.5, i have been told to cut some holes in the hood and mount some p.c style fans, will this drop roughtly 2 / 3 degrees any idea chaps help greatly recieved
kindest regards stuart
kindest regards stuart