Fish Tanks
Tanks & Aquariums
Tank Stands
Filters & Filter Media
Live Fish
Tank Heating
Health & Maintenance
Test Kits
Tank Decorations
Aquariums and Fish Tanks for Every Fishkeeping Journey
Looking for the perfect fish tank or aquarium? At Petstock NZ, we offer everything from compact nano tanks to large Aqua One aquariums, ideal for tropical or cold-water fish. Whether you're after a modern glass tank, a full starter kit, or a sleek design with built-in filter and lighting, we’ve got you covered. Not sure where to begin? Check out our guide on How to Choose a Fish Tank to find the right size and type for your needs.
Complete your setup with essential aquarium accessories like filter media, heaters , air pumps, and water treatments. Want to personalise your space? Browse our range of fish decorations, artificial and live plants, and substrates to create a natural and visually appealing environment. For inspiration, explore How to Create the Perfect Habitat for Your Fish with Aqua One.
Whether you're setting up your first fish tank or upgrading your current setup, Petstock NZ has everything to help your fish thrive. Just getting started with fishkeeping? Our First Pet Fish Guide covers all the basics to help you care for your new aquatic friend with confidence.
What equipment do I need to set up a fish tank?
To set up a fish tank, you'll need a tank, filter, heater (for tropical fish), lighting, water conditioner, substrate (like gravel or sand), and decorations or plants. A water test kit is also helpful to monitor your tank’s water quality during setup.
How long should I wait before adding fish to a new aquarium?
You should wait at least 24 to 72 hours after setting up your aquarium — and ideally cycle the tank for 1–2 weeks to allow beneficial bacteria to build up and stabilise the water.
What is the nitrogen cycle and why is it important?
The nitrogen cycle is a natural process that converts fish waste (ammonia) into less harmful compounds like nitrites and nitrates. Cycling your tank before adding fish is essential for maintaining a safe and healthy aquarium. To speed up the process, you can use a starter product like API Quick Start, which introduces beneficial bacteria to kickstart the cycle.
Should I use live plants or artificial ones in my fish tank?
Both options work well. Live plants help with oxygenation and water quality, while artificial plants offer easy maintenance and visual appeal — especially for first-time fishkeepers.
How do I set up a tropical vs. cold water fish tank?
Tropical fish tanks require a heater to maintain a stable temperature between 24–26°C. Cold water tanks don’t need heating, but both setups require filtration, lighting, substrate, and decorations.