China has a small number of reputable brands that have a good enough track record and enough local use that warranties can actually be fulfilled and quality is close enough to American made products that someone on a budget might consider them. Reefing examples include Kamoer, Bubble Magus, NooPsyche, ReefBreeders, some Jebao, etc.I find it interesting that in some areas like lighting anything from amazon or China is considered "cheap" by many people. But then you turn around and look at dosing pumps and Kamoer is highly recommended brand, that comes from china.
The problem with no name amazon equipment is they are very often lower quality reverse engineered attempts at a more reputable brands design and more often than not if something goes wrong after 30 days, you are **** outta luck because chinese companies pass warranty onto the distributor. If the chineae brand isn't large enough to have local repair and warranty centers, they will just ignore your warranty claim and do nothing for you.