Fix the water. Enjoy the fish.
Aquarium problems explained step by step, and the equipment designed for them. Research-based, beginner-friendly, no hype.
Substrate, Plants & DecorGravel, sand and plant soil, live and artificial plants, rocks, driftwood and decor that are safe in a tank.47 guidesFilters & MediaCanister, hang-on-back, sponge and internal filters by tank size, plus the media inside them.61 guidesTanks & StandsTanks and starter kits by size and fish, and stands rated to carry them.28 guidesAir, CO2 & PumpsAir pumps and stones, water and return pumps, and CO2 systems for planted tanks.41 guidesLightingLED fixtures by tank length and use: fish-only, low-tech planted, high-light planted.19 guidesSaltwater & ReefReef and marine gear: all-in-one tanks, skimmers, powerheads, salt and auto top-off.15 guidesWater Care & TestingTest kits, conditioners, bacteria starters and treatments, each tied to the water problem it addresses.24 guidesCleaning & MaintenanceVacuums, siphons, scrapers, algae tools and buckets.16 guidesFood & FeedingFish food by species and diet, and automatic feeders for holidays.9 guidesHeaters & ThermometersHeaters by tank size and control type, and thermometers to check them.15 guides
Recent guides
Food & Feeding9 Best Tropical Fish Foods: Flakes, Granules and Pellets
Food & FeedingBest Betta Fish Food: Floating Pellets, Flakes and Treats
Substrate, Plants & DecorBest Aquascaping Tools: Tweezers, Scissors, Spatulas and Kits
Food & FeedingBest Shrimp Food for Freshwater Aquariums: Pellets, Sticks and Shrimplet Food
Cleaning & MaintenanceBest Algae Scrapers for Glass and Acrylic Aquariums: Magnetic and Handheld
Water Care & TestingBest Phosphate Removers for Aquariums: Media and Liquids for Freshwater and Reef
Useful reading from Fishkeeping
Equipment ExplainedHow to Reduce Filter Current for Bettas, Shrimp and Fry
Tank Setup & CareAquascaping for Beginners: A Guide to Layout Rules and Your First Scape
Tank Setup & CareHow Often to Fertilize Aquarium Plants: Liquids and Root Tabs