Upon arrival I immediately proceeded to testing the chiller to ensure it operates within the specs advertised. Upon initial observation I noticed that the flow was consistent, but the heater itself was not heating the water at a reasonable rate, whats reasonable? I waited for almost 24 hours for the heater to almost reach 30c and it couldnt surpass that temperature. The Seller refused to acknowledge the problem and instead offered a host of excuses. unfortunately in the dispute process with Alibaba, the machine further deteriorated and stopped circulating water consistently. in fact, I would turn the machine on, the flow would bounce up and down for 10 or so minutes and the machine would shut down on its own. I again reached out to the Seller with video evidence and the Seller again provided excuses. I tried offering to fixing it with a local tech out of pocket but Seller doesnt operate in good faith, and does NOT offer good quality products that are built to last. Machine is broken.