Akvárium Online is a Slovak family-run aquarium business operated by the Fuljer couple, with a 25-year tradition in aquaristics. The company serves aquarium enthusiasts through an online shop offering equipment, livestock-related supplies and solutions for setting up and maintaining freshwater aquariums. It highlights its range of exotic African cichlids as the largest selection in Slovakia and provides products tailored to keeping and breeding these fish.

Customers can choose from complete aquarium sets and standalone tanks, including custom-sized aquariums, turtle tanks, shrimp aquariums, paludariums and wall-mounted designs. The catalogue also covers filtration, pumps, heaters, lighting, aeration and CO2 equipment, alongside decorations, plants, rocks, roots, substrates and aquarium foods for different fish. Practical accessories include water tests, cleaning tools, hoses, nets and maintenance supplies, while treatments and other preparations support fish health and aquarium care. Akvárium Online also offers custom aquarium services and shares information through its blog. The shop advertises free delivery for orders over €99.