🐠 [Best Small Fish Tank on amazon]: The 1.2 gallon office desktop square small fish tank can raise betta, guppies, angel fish and other ornamental fishes. The fish tank is equipped with led lights and two decorative plastic aquatic plants, and you can also buy other decorations by yourself. What's more, the small fish tank would be make you more happy and relaxed even in day or at night. 👍 [Free Aquarium starter kit]: there is a free complete filtration system hidden well behind the fish tank .This filter system can be removed and the space will larger after removed(Attention: According to our guests' experience, betta fish is easier to survive without a filter.This filter system can be removed and you can use it in ponds or other fish tanks. ) 🔌 [Power supply]: The power bank or computer terminal are available for charge supply as it is 5V USB power. if the water pump doesn't work after the fish tank installation, the reason for that the voltage is not enough.You can use power bank or phone power plug to have a try.