Cold Water Reef Plan

[Coldwater]

Stupid question, how cold does a cold water tank have to be? My basement will keep standing water at 66F no problem.

In the winter the west coast of the island is about 9 degrees Celsius. 66 degrees Fahrenheit is about 19 degrees Celsius. It can be around 8-14ish degrees Celsius (46-59 degrees Fahrenheit) at the most or less. What ever you want. The ocean temperature doesn't really change temperature much during the seasons.

Matt