Lindsay and I have a Current USA Chiller that will work up to 55 gallons, that we have no use for anymore. We used it for 8 months when I was in the dorm using HQI lighting. Since we switched over to LED, and now have air conditioning we don’t need it. If interested, please let us know!
well, actually, it works to some degree on any size tank. just not sized to bring a large tank way down, but could keep it out of the danger zone in hot weather temp spikes. you know like set it at 78 and as the temp rises due to house temp and humidity and lights, it runs and slows down the rise until lights out, and then cools to 78. that would work. it just wont drag it down to 74 on 180 gallon. Its rated for BTU per hour.
just my :TWOCENTS .