Fish & Livestock Care

In-depth care guides for aquarium fish, invertebrates and aquatic livestock — setup, feeding, tank mates and disease prevention.

309+ Reviews

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Choosing between a hang on back skimmer and an in sump skimmer is less about...

David Nguyen Sep 18, 2026

Choosing between a digital pH meter and a liquid test kit is less about finding...

David Nguyen Sep 18, 2026

Choosing between aragonite sand and crushed coral substrate is less about which material is “better”...

David Nguyen Sep 18, 2026

Choosing between a canister filter and a hang-on-back (HOB) filter is less about finding a...

David Nguyen Sep 18, 2026

Choosing a hang-on-back filter is often a small-room problem disguised as an aquarium problem. In...

David Nguyen Sep 18, 2026

A protein skimmer cup collects concentrated organic waste, so it can become sticky, foul-smelling, and...

David Nguyen Sep 18, 2026

Choosing a protein skimmer by the biggest gallon rating on the box is one of...

David Nguyen Sep 18, 2026

Choosing an LED light by color alone is a common mistake. A package may say...

David Nguyen Sep 18, 2026

The Short Answer Usually, yes—but only if your room stays below your fish’s required temperature....

David Nguyen Sep 18, 2026

The Short Answer Yes—if your plants do not receive enough bright natural light for several...

David Nguyen Sep 18, 2026

Choosing between a 20 gallon long and a 20 gallon high is less about the...

David Nguyen Sep 18, 2026

Running two sponge filters in one aquarium sounds simple until the air pump starts rattling...

David Nguyen Sep 18, 2026