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Freshwater Aquarium Utility Platform

Aquarium compatibility and tank planning tools.

Search fish species, compare compatibility, estimate stocking levels, and plan healthier freshwater aquariums using practical database-style tools.

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Featured Planning Tool

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Build your freshwater aquarium and receive stocking, compatibility, equipment, temperature, and setup guidance in one practical workspace. Your build is saved in your browser as you plan.

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Species Care Guides

Plan around the fish, not just the tank.

Quick, practical care profiles covering tank size, temperament, water needs, diet, and compatible tank mates.

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plecos-eating

Bristlenose Pleco Care Guide

Ancistrus cirrhosus

The Bristlenose Pleco (Ancistrus spp.), also known as the Bushynose Pleco or Bristlenose Catfish, is a peaceful freshwater catfish recognized by the distinctive bristles that develop around its snout. Smaller than many other plecos, they are popular community fish that spend much of their time grazing on surfaces and sheltering among driftwood, rocks, and caves. Bristlenose Plecos come in numerous species and aquarium-bred varieties, including Albino, Super Red, Calico, Longfin, and Black-Eyed Yellow forms. More specialized varieties include fish identified by L-numbers, such as the sought-after L183 Starlight Bristlenose (Ancistrus dolichopterus), along with L181, L182, and L184 Ancistrus. L-numbers are identification codes used in the aquarium hobby for loricariid catfish, particularly when a fish entered the trade before receiving a confirmed scientific name. An L-number therefore identifies a particular form or species and isn't simply a color or pattern designation.

Care
Easy
Tank
20+ gal
Nature
Peaceful
Male-Danio

Celestial Pearl Danio Care Guide

Danio margaritatus

The Celestial Pearl Danio (Danio margaritatus) is a small, colorful freshwater fish known for its pearl-like spots, vivid red-orange fins, and peaceful nature. Native to shallow, heavily vegetated waters in Myanmar, these active nano fish thrive in planted aquariums and do best when kept in groups. Their striking appearance and manageable care requirements make them a popular choice for both beginner and experienced aquarists.

Care
Intermediate
Tank
10+ gal
Nature
Peaceful
guppy

Guppy Care Guide

Poecilia reticulata

The Common Guppy (Poecilia reticulata) is a small, colorful freshwater fish known for its bright colors, active personality, and ease of care. Native to northeastern South America and parts of the Caribbean, guppies are highly adaptable and have become one of the most popular aquarium fish worldwide. They are peaceful, social livebearers that thrive in groups and work well in many community aquariums. Their hardiness and relatively simple care requirements make them an excellent choice for beginner aquarists.

Care
Easy
Tank
10+ gal
Nature
Peaceful

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Compatibility Checker

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Care Guides

Browse practical species profiles covering care, behavior, habitat, feeding, water needs, and aquarium requirements.

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