The care library
Fish care, made simple
Easy, friendly guides written by real keepers. No jargon — just clear steps to keep your fish happy and healthy.
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Cichlid8 guidesKoi8 guidesArowana7 guidesDiscus7 guidesBetta6 guidesGoldfish6 guidesPufferfish6 guidesAxolotl4 guidesCatfish4 guidesEel4 guidesGar4 guidesOscar4 guidesStingray4 guidesBarb3 guidesGoby3 guidesGrouper3 guidesKnife Fish3 guidesLoach3 guidesAngelfish2 guidesPiranha2 guidesPleco2 guidesTang2 guidesBass1 guide
New to fish? Start here
The three things every beginner should read first.
Easy · 7 minThe Nitrogen CycleA comprehensive guide to understanding and establishing the nitrogen cycle in freshwater aquariums, covering the biology of nitrifying bacteria, fishless cycling with ammonia, fish-in cycling, testing protocols, troubleshooting stalled cycles, and maintaining the cycle long-term.Read it →Easy · 6 minAquarium Water Testing GuideA practical guide to testing aquarium water parameters, comparing liquid vs. strip kits, explaining each parameter (ammonia, nitrite, nitrate, pH, GH, KH, TDS), recommending testing schedules, and interpreting results for corrective action.Read it →Easy · 6 minFish Acclimation GuideA practical guide to acclimating new aquarium fish, comparing the drip method, float method, and plop-and-drop approach, with species-specific recommendations and common acclimation mistakes to avoid.Read it →
Browse by topic
Deep dives on the skills behind happy fish.
Tank Setup7 guidesComplete aquarium setup guides covering tank dimensions, filtration systems, substrate, lighting, and equipment for exotic fish species.Water Chemistry6 guidesIn-depth guides to aquarium water parameters, testing, the nitrogen cycle, and species-specific water chemistry requirements.Feeding & Diet5 guidesComprehensive feeding guides for exotic fish species — diet protocols, nutrition requirements, feeding schedules, and food recommendations.Breeding5 guidesStep-by-step breeding guides for exotic aquarium fish — conditioning, spawning, fry care, and genetic selection techniques.Disease & Treatment5 guidesFish disease identification and treatment guides — ich, fin rot, parasites, quarantine protocols, and preventive health management.Tank Mates & Compatibility7 guidesFish compatibility guides — which species can coexist, aggression management, stocking ratios, and community tank planning for exotic fish.Equipment3 guidesAquarium equipment guides — filters, heaters, lighting, protein skimmers, and accessories reviewed and recommended by professional aquarists.Species Care20 guidesComplete care guides for specific exotic fish species — covering tank requirements, water parameters, diet, breeding, and health management.