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🏰 Dive into the world’s only Instant Pets®—where magic meets micro-life!
Sea-Monkeys® Magic Castle is a unique instant pet kit featuring cryptobiotic dry eggs that hatch upon adding water, housed in a stylish plastic tank. Designed for ages 6+, these resilient creatures thrive for up to two years with minimal care, offering a captivating blend of science, nostalgia, and low-maintenance companionship perfect for busy professionals seeking a quirky, living desk companion.








| ASIN | B07T1WGMKQ |
| Age Range Description | 6+ years |
| Best Sellers Rank | #32,306 in Toys & Games ( See Top 100 in Toys & Games ) #31 in Habitat Science Kits |
| Brand Name | Sea Monkeys |
| Customer Reviews | 4.0 out of 5 stars 1,459 Reviews |
| Educational Objective | STEM |
| Global Trade Identification Number | 04894166232308 |
| Included Components | toy |
| Is Assembly Required | No |
| Item Dimensions | 7.44 x 5.5 x 5.5 inches |
| Item Type Name | Toy |
| Item Weight | 1.8 Ounces |
| Manufacturer | Sea Monkey's |
| Manufacturer Maximum Age (MONTHS) | 1200.0 |
| Manufacturer Minimum Age (MONTHS) | 72.0 |
| Manufacturer Part Number | DI23230 |
| Material Type | Plastic |
| Model Number | DI23230 |
| Size | Mittel |
| Sub Brand | Sea Monkeys |
| Theme | Aquatic life, Animals |
M**A
Hard to see, but they're there!
Dont be so quick to throw them away, they're there, you just cant see them. There are a few things you have to keep in mind to raise these. - They need warm temperatures, at least 70 degrees F, too chilly and they will not thrive and even die. - They need oxygen. Either use the little pump thing it came with to blow bubbles in the tank( google to find out how often), or if youre too lazy like me, get a pump with an air stone, and put on the lowest setting. Too much agitation will kill them. - They dont over eat, what kills them is suffocation. If the water is murky, thats too much food, and they will suffocate, especially if you're not blowing bubbles or dont have a bubbler with a pump. I usually feed them when water is clear. I thought mine died off, but then I saw 4 all of a sudden. They started having babies, now I have a ton of them. I just leave them be. I top off the water up to line, thats to keep the salinity level constant. Make sure pump is working and they get enough oxygen. I dont have them by a window, but I do use a grow light. They stay at 76-78 degrees, I keep them by the tv, that keeps them warm. I feed them about every other day, not too much. You have to play it by ear, and depends on how much critters you have in your tank. I got the Magic Castle on April 13, and it is now June 13. So far they are thriving. I got the Sea Monkeys on Mars June 5, so they're just starting to show up. Over all they are easy to take care of. No need for water changes. Don't remove the muck that accumulates at the bottom of their tank, they need that. The dead sea monkey are full of vitamins and minerals, that the live ones need. There's also eggs in there. Dont change the water either, you'll end up throwing away the babies that you can't see. I noticed that a lot of the low reviews were during the winter months. The reason why they either didnt hatch or died off was probably because they were cold. They need warmth, at least 76-80 degrees F. These arent toys, they are living beings with specific needs to live and thrive.
I**S
Fun pet!
My sea monkey tank has been setup for 3 weeks now and they’re starting to get bigger! Such a fun and easy pet to own. My younger siblings enjoy watching them. Instructions are easy to follow. I’d say it’s a pretty fair price and would make an awesome gift for someone!
J**N
Very disappointed
90% of them didn’t hatch and the ones that did lived 2 days. 😢 we followed instructions to a T and have had others live over 6 months. Very disappointed
V**G
Long live the sea monkeys!
I bought this product (and Sea Monkeys on Mars) to share a bit of fun nostalgia with my high school students. We read an article about fairy shrimp materializing at Burning Man and my students had no idea what sea monkeys were. As a millennial, I wanted to share the excitement of watching these little swimmers materialize from dust that I remembered from my own youth. I bought two sets and set them up with different classes. The sea monkeys hatched within a few days and for the first month or so, there were lots (maybe 15-20?). We could watch them swim around their habitat and even were able to observe them mating and carrying egg sacs (and pooping). My students were amazed. A year later and there are still 4-6 guys swimming around and reproducing. We used distilled water and the purification drops provided, fed them the growth food once a week (there is still half a bag left from the original kit), and aerated the water daily with the pipette provided. We didn’t buy a fancy filter and did not clean the container when debris started to settle at the bottom, though we did continue to add fresh distilled water as it evaporated. Great gift and tons of fun!
R**Y
Keep the babies warm and aerated and they thrive!
I got the kit and like many, didn't have a lot of babies at first. I ended up getting a heated mat along with a controller for the temp and did a lot of research. Keep these babies at 75-81F and pump air with the "aqua leash" a couple times a day for about 15 seconds... and they will hatch. I had a small handful at first. Now I have more than 25! Reverse osmosis water works for adding the water if that's all you can find. Do not get anything with added minerals or salt or anything at all. Just plain distilled or reverse osmosis water. They are pretty much the same thing. Feed the babies only a half of that spoon every three days until fully grown then about once every 5 days and only when the water is clear and they have no "dark line" running through their bodies. That means they are ready to be fed... if you see a line, they have eaten and have food still to digest. Hope this all helps! This kit reminded me of when i was younger growing them for the first time as a teenager. Now as an adult... I have done much better raising them. I have had them for 9 days now and they are getting so much bigger. Remember - keep the babies warm and they will hatch. A little usb heater and small air pump with control valve that has only a few bubbles going a minute without splash will work wonders. :3 Happy hatching!
J**K
Lived almost 1 year.
Mine did great, they almost lasted a year, but I think it got too cold for them in the winter. I would have liked the set to be bigger. Overall. Would purchase from this brand again.
M**Y
Ma
I was not aware this was a used item. Not worth anything to us now and too late to order a new one. Not pleased at all.
G**L
Modelo surtido, rosa, cristal
LLegó bien a Chile, recordar que el modelo puede variar entre el de cristal y el rosa, por suerte tenia el cristal, y me llego el rosa. pura suerte
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