Other too... pretty much have everything under the sun except maybe a chiller. Waiting to see how well my new big buck AC system does when the heat cranks up here. I'd like to keep a more consistent 78F and in previous summers not uncommon for tank to run 80-83F and require fans.
I've had my eye on the Lamotte Waterlink spin tester for a minute now. if I'm splurging, I would put it down toward that. Otherwise I have pretty solid gear.