Fish Encyclopedia

💡 Keep alone — highly territorial with other bettas.

💡 Keep ratio 1 male to 2+ females to reduce harassment.

💡 School of 10+ in soft acidic water keeps neons stress-free.

💡 Needs very soft, slightly acidic water; avoid hard tap water.

💡 Red nose intensity is a reliable water-quality indicator.

💡 Hardy schooling fish; avoid fin-nippers with long-finned species.

💡 Requires very soft, acidic blackwater conditions to truly thrive.

💡 Fin-nipper — keep in large schools and avoid slow fin-finned tankmates.

💡 Males display iridescent scales best under dim, warm lighting.

💡 Calm personality; thrives with dense planting and gentle flow.

💡 One of the most peaceful community fish; loves planted tanks.

💡 Nano fish — only keep with equally small, peaceful tankmates.

💡 Fast active swimmer; needs open midwater space to school properly.

💡 King of aquariums — requires pristine water and frequent changes.

💡 Highly intelligent but messy — oversized filtration is mandatory.

💡 Tall tanks suit their body shape; avoid with small neon tetras.

💡 Very temperature-sensitive; needs warm, very soft, pristine water.

💡 Aggressive hybrid — usually best kept solo with strong filtration.

💡 Pairs do best with lots of hiding caves and broken sightlines.

💡 Bottom dweller — keep on smooth sand to protect barbels.

💡 Tolerates warmer water — ideal for discus community tanks.

💡 Cooler-water corydoras; keep in groups of 6+ for confidence.

💡 Best algae eater for most community tanks; needs driftwood to rasp.

💡 Delicate at purchase — quarantine carefully and add to mature tanks.

💡 Grows very large — often sold as "small" but needs a big tank long-term.

💡 Escape artist — tight-fitting lids and fine sand substrate are essential.

💡 Excellent snail hunters; keep in groups of 3+ to reduce shyness.

💡 Peaceful loach; great for planted tanks with soft sandy substrate.

💡 Needs high oxygen, strong flow, and cool temps — not a beginner loach.

💡 Thrives in most water; avoid copper-based medications — lethal to shrimp.

💡 Best algae-grazing shrimp; cannot breed in freshwater.

💡 Demands very soft, acidic, stable water — any spike causes losses.

💡 Great algae cleaner and live food source; inexpensive and resilient.

💡 Filter-feeder; place near gentle current so it can fan-feed naturally.

💡 Pond fish primarily — outdoor ponds with heavy filtration are ideal.

💡 Cold-water fish — do not mix with tropical species needing warm water.

💡 Tolerates brackish water; a pinch of aquarium salt reduces disease.

💡 Hardy and colorful; best kept in mixed sex groups with more females.

💡 Ideal cycling fish; extremely hardy and very active shoalers.

💡 Keep in groups of 8+ to direct nipping behavior within the school.

💡 Shy and peaceful; densely planted tanks bring out bold red coloration.

💡 Active and colorful; needs open swimming space and good nutrition.

💡 One of the most beginner-friendly labyrinth fish; very peaceful.

💡 Beautiful and hardy; needs floating plants to feel secure.

💡 Produces chirping sounds; perfect for peaceful nano community tanks.

💡 Cold-water nano fish; thrives unheated in temperate rooms.

💡 Territorial toward its own kind; only one per tank recommended.

💡 One of few fish that eats black beard algae; grows larger than expected.

💡 Aggressive fin-nipper despite tiny size; best kept species-only.

💡 Surface fish and expert jumpers; tight-fitting lid is non-negotiable.

💡 Very active and fast; needs a long tank and tight lid to prevent jumping.

💡 Peaceful nano fish; floats almost motionless in planted tanks.

💡 Active livebearers; males may bicker — add only one male per tank.

💡 Legally protected species in many countries; requires CITES documentation.

💡 Stunning nano fish that breeds readily in caves; very peaceful.