Read and follow instructions. Very easy to set up. Be patient and soak the "jelly" overnight and rinse thoroughly. Very interesting and I love the color cycle and the fact that it "instantly turns off" after 4 hours of continuous use. Use distilled water. It's cheap and available at any grocery store. You don't have to worry about unwanted minerals in the water or algae like you would in a 'real' aquarium. So much fun to watch these "dancing jellies" and I love that it's LED so there's no heat issue. I just got it on 1/31/22. Update: 22/19/22 After a couple of weeks, there was an annoying "hum" that was literally giving me a headache. Following the attached instructions, I contacted customer service. Denise emailed me quickly and assured me a replacement would be shipped which arrived today along with the promised free gift. This is a remote controlled spider that I can use for Halloween. Ironically the loud hum stopped a few days ago, but if it happens again I'll set up a new tank right away. The customer service from this seller is fantastic and I would buy from them again. If that was an option I would add another star for that reason alone.
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