Cycle it, plant it, keep it clear

Keep a freshwater tank that actually thrives.

A calm, practical guide to keeping freshwater fish. We walk through setting up and cycling a tank, keeping the water right, choosing fish that get along, growing live plants, and heading off disease — written plainly, by people who have scrubbed an algae-covered glass at 11 p.m.

Fresh from the tank

26 guides
Water Quality

Understanding pH, GH, and KH in Freshwater Tanks

Learn what pH, GH, and KH mean for your freshwater aquarium, how they interact, and how to match them to your fish's needs.

August 19, 2026
Tank Setup

Choosing Aquarium Substrate: Gravel, Sand, or Aquasoil

Compare gravel, sand, and aquasoil to pick the best aquarium substrate for your fish, plants, and budget. Practical depths, weights, and setup tips inside.

August 17, 2026
Maintenance & Gear

How to Clean an Aquarium Filter Without Killing the Cycle

Learn how to clean your aquarium filter safely, rinse media in tank water, and avoid crashing your nitrogen cycle. Step-by-step guide for freshwater tanks.

August 14, 2026
Health & Disease

Why Your Fish Is Gasping at the Surface

Fish gasping at the surface usually signals low oxygen or poor water quality. Learn the top causes and how to fix them fast.

August 12, 2026
Aquarium Plants

Aquarium Lighting for Plants: How Much and How Long

Learn how much light planted tanks actually need, how long to run aquarium lights, and which PAR values suit low, medium, and high-tech setups.

August 10, 2026
Fish Profiles

Corydoras Catfish Care: The Friendly Bottom Dweller

Learn corydoras care basics: tank size, water params, diet, tankmates, and group size. A practical guide from a fellow hobbyist.

August 7, 2026
Water Quality

How to Do an Aquarium Water Change the Right Way

Step-by-step guide to aquarium water changes: how much to change, how often, and the right tools to keep your fish healthy.

August 5, 2026
Tank Setup

Fishless Cycling vs Fish-In Cycling: Which to Choose

Compare fishless cycling and fish-in cycling to pick the right method for your new aquarium. Includes timelines, ammonia tips, and what to watch for.

August 3, 2026
Maintenance & Gear

How to Get Rid of Algae in a Freshwater Tank

Practical steps to remove green water algae, black beard algae, and other common tank algae, plus how to stop it from coming back.

July 31, 2026
Health & Disease

How to Set Up and Use a Quarantine Tank

Learn how to set up an aquarium quarantine tank to protect your fish. Covers sizing, cycling, treatment protocols, and when to use a hospital tank.

July 29, 2026
Aquarium Plants

Do You Need CO2 for a Planted Tank?

CO2 injection isn't required for every planted tank. Learn when it helps, when to skip it, and how low-tech setups thrive without a pressurized system.

July 27, 2026
Fish Profiles

Neon Tetra Care and Ideal Tankmates

Learn neon tetra care essentials: tank size, water parameters, schooling needs, feeding, and the best tankmates for a thriving community aquarium.

July 24, 2026
Water Quality

Ammonia, Nitrite, and Nitrate: What the Numbers Mean

Learn what ammonia, nitrite, and nitrate levels mean for your freshwater aquarium, what's safe, and what to do when readings spike.

July 22, 2026
Tank Setup

The Nitrogen Cycle: How to Cycle a New Fish Tank

Learn how to cycle a fish tank the right way. Understand the nitrogen cycle, grow beneficial bacteria, and know exactly when your aquarium is safe for fish.

July 20, 2026
Maintenance & Gear

How to Clean Aquarium Glass and Remove Algae

Learn how to clean aquarium glass and remove green algae fast using the right scraper technique, safe products, and a routine that keeps glass clear long-term.

July 17, 2026
Health & Disease

Fin Rot: Causes, Treatment, and Prevention

Learn what causes fin rot in freshwater fish, how to treat it at home, and how to stop it coming back. Practical steps from diagnosis to recovery.

July 15, 2026
Aquarium Plants

How to Plant and Anchor Aquarium Plants

Learn how to plant aquarium plants correctly in gravel, sand, or on hardscape, with tips for anchoring rhizome plants and rooted stems.

July 13, 2026
Fish Profiles

Guppy Care Guide: Setup, Diet, and Breeding

Everything you need to keep guppies healthy: tank size, water parameters, feeding schedules, and how to breed them successfully at home.

July 10, 2026
Water Quality

How to Test Aquarium Water (and How Often)

Learn how to test aquarium water with liquid kits or test strips, what parameters to check, and how often to test for a healthy freshwater tank.

July 8, 2026
Tank Setup

What Size Aquarium Should a Beginner Get?

The sweet spot for a first fish tank is 20 gallons. Here's why bigger tanks are easier to manage and how to choose the right size for your space.

July 6, 2026
Maintenance & Gear

A Simple Weekly Aquarium Maintenance Routine

A practical aquarium maintenance schedule that keeps water quality stable and fish healthy, with a checklist you can actually follow each week.

July 3, 2026
Health & Disease

Ich (White Spot): How to Identify and Treat It

Learn how to treat ich in freshwater aquariums: spot the symptoms early, understand the life cycle, and clear white spot disease safely.

July 1, 2026
Aquarium Plants

Best Low-Light Aquarium Plants for Beginners

Discover the best beginner aquarium plants that thrive in low light with no CO2 injection. Practical picks, care tips, and setup advice for new fishkeepers.

June 29, 2026
Fish Profiles

Betta Fish Care: Tank Size, Water, and Tankmates

Keep betta fish healthy with the right tank size, water parameters, temperature, and compatible tankmates. Practical guidance for new and seasoned keepers.

June 26, 2026
Water Quality

Aquarium Water Parameters Explained for Beginners

Learn which aquarium water parameters matter, what the safe ranges are, and how to keep them stable for healthy freshwater fish.

June 24, 2026
Tank Setup

How to Set Up Your First Freshwater Aquarium, Step by Step

Learn how to set up a freshwater aquarium the right way: from choosing a tank size and gear to cycling the water before your first fish.

June 22, 2026

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