Not using a chiller yet; I raised them at 18-20 C (64-68 F) to get a shorter larval period, and I'll probably keep them around that temp. My apartment is poorly heated on one end so I'm keeping them there to keep the temp down during the winter.
Even though they are most abundant in the cold waters of the Gulf of Maine and up into Canadian water, their southern range extends down to North Carolina. In fact, several of my professors are hoping to study similar effects over a four year period in at or a little bit lower temp water to try and get sexually mature animals.
Other than not having a chiller, I was basically just going to have a HOB
filter and do frequent water changes to keep everything low.