The newest chiller coming out of Tunze is the ultra new AT5000. This thing can handle aquarium from 100-400 gallons without any problems. The BTU is rated at 5000, which is about double on similar sized models. Can run between 400GPH and up to 1,000 GPH (nice!). It’s available now at Tunze retailers and your local fish stores. Estimated retail price is expected to hit at $1299. We aren’t sure if this will hit the european market, but as it is with all things, time will tell.