Aquarium care advice you can actually trust.

Evidence-based freshwater, pond, and reef guides - grounded in water chemistry and real husbandry practice, not guesswork.

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Target ranges at a glance

pH: 7.0-7.5
Temp: 76-80°F
Ammonia: 0 ppm
Nitrite: 0 ppm
Nitrate: <20 ppm
Hardness: 4-8 dGH

Illustrative healthy ranges for a typical freshwater community tank - not a reading from your aquarium.

Recent guides

A bristlenose pleco clinging to aquarium glass, showing the fleshy tentacles on its snout

Fish

Bristlenose Pleco Care: Tank Size, Diet, Breeding, and Lifespan

Bristlenose plecos stay under 5 inches, happily graze algae, and thrive in a 25-30 gallon tank. This guide covers tank size, water parameters, diet, tank mates, sexing, breeding, and lifespan.

July 9, 2026

Photo by Psychlist1972 on Openverse (CC BY 2.0)

Aquarium

How Long Can Fish Go Without Food? A Vacation Survival Guide

Most healthy adult aquarium fish can safely go 1-2 weeks without food. Here is how long different species can last, which fish you should not leave unfed, and how to feed your tank while you are away.

July 9, 2026

Photo by Tahir mq on Openverse (CC BY-SA 4.0)

Java fern with its distinctive strap-shaped green leaves growing in a planted aquarium

Plants

Java Fern Care: A Complete Guide to Planting, Light, and Propagation

Java fern is one of the easiest aquarium plants to grow, as long as you never bury its rhizome. Here is how to plant, light, feed, and propagate it, plus how to fix melting leaves.

July 9, 2026

Photo by ictheostega on Openverse (CC BY 2.0)

Aquarium sump with filtration chambers set up beneath a display tank

Aquarium Equipment

Canister Filter vs Sump: Which One Fits Your Tank?

How canister filters and sumps work, their real cost and noise tradeoffs, and which system fits a freshwater, saltwater, or nano reef tank best.

July 9, 2026

Photo by Fish Tank Society on Openverse (CC BY-SA 4.0)

Macro view of tiny copepods and zooplankton in a reef aquarium refugium

Saltwater

Copepods in a Reef Tank: How to Grow a Pod Population

What copepods are, why a reef tank needs them, and how to build a self-sustaining refugium population that feeds mandarin dragonets, pipefish, and corals.

July 9, 2026

Photo by Lion Pods Live Copepods on Openverse (CC BY 4.0)

Pond

Pond Filtration Systems: Types, Sizing, and Maintenance

A pond filtration system combines mechanical, biological, and UV filtration stages to keep water both clear and genuinely safe for fish. Here is how to size a filter and pump to your pond and spot the signs of under-filtration.

July 9, 2026

Photo by Photo Cindy on Openverse (CC0)