How to Clean an Aquarium Filter Without Losing the Cycle
Learn how to clean your aquarium filter without disrupting the nitrogen cycle, including how to rinse filter media safely, protect beneficial bacteria, and keep your tank healthy.
Fish & Aquatic Pets
Aquarium guides for goldfish, bettas, guppies and community fish, from cycling a new tank and choosing a filter to water changes and common fish diseases.
Aquarium Care While on Vacation: A Feeding and Equipment Plan
Prepare your aquarium for a holiday with tested feeding arrangements, simple sitter instructions, equipment checks, and a sensible return routine.
How to Quarantine New Freshwater Fish Before Adding Them
Set up a suitable quarantine aquarium, protect water quality, use separate equipment, and know when new fish need expert assessment before introduction.
Betta Fish Enrichment: A Tank That Offers More Than Open Water
Give a betta fish a more useful tank layout with cover, resting spots and gentle water flow.
Beginner Aquarium Plants: How to Choose and Set Them Up
Choose beginner aquarium plants that suit your light, substrate and tank conditions.
How to Control Aquarium Algae Without Upsetting Your Fish
Control aquarium algae with steady light, feeding and maintenance while protecting fish and plants.
Why Is My Aquarium Water Cloudy? A Troubleshooting Guide
A step-by-step way to investigate cloudy aquarium water without making sudden changes that stress fish.
How to Do an Aquarium Water Change
A practical walk-through of partial water changes for freshwater tanks, from how much to change to treating tap water and protecting filter bacteria.
How to Cycle a New Aquarium Before Adding Fish
A plain guide to the aquarium nitrogen cycle, fishless cycling, water testing and adding fish gradually to avoid new tank syndrome.
Can Betta Fish Live With Other Fish? What to Know First
Why male bettas must live apart, which tankmates sometimes work, which fish to avoid and why you need a backup tank.