Will I need a chiller

[carberarr]

I have a 26 Gallon Bow, was wondering if I would need a chiller if I have a 150W HQI MH? It will be mounted above my tank with the included legs.

[gzeiger]

Depends what fish you keep I would guess. Keep a close eye on temperature the day you install the light, and make sure it isn't above what the fish will tolerate. Add a heater with an adjustable thermostat and set it so that temperature doesn't fluctuate from day to night, and you'll be ok. A chiller shouldn't be required just because you have a good light.