the chio chio hood with me liao lah...i took over the tank with the hood....but then again, i sold the hood at a lost cos i managed to get a lighter hood for free....
go for MH....it is not as terribly hot as most reefers think....with good air circulation between the MH and the water surface, the increase in water temperature is not tat bad....
i'm running a single 150W with no chiller....when MH is off (1 fan running) water temperature is less than 27, with MH on (2 fans running) temperature is still less than 27....but if that is now lah, after the heat waves.....
during the heat wave period 3weeks back, my tank was running up to 30 (sometimes more) with MH on....without MH on it was slightly less than 30....well at least i now have 1yr's time to save money for a chiller...b4 the next heat wave comes.....