265 gallon tank chiller question

[pgaudreau]

I just finished assembling a new 265 gallon marineland reef tank with 4 ecotech lights, eshopps 300 refugium, 55watt uv, bio pellet, etss skimmer and three pumps, one dolphin, and two blue line. Temperature is unfortunately warmer than what I would like stayin between 81 and 82. I would like it to be around 78, what is everyone's recommendation on chiller size for that size tank. I originally though 1/2 hp is enough but dont want to undersize either.