🔄Last Updated: 6 September 2026•Originally published: 28 January 2020
🐠 Fish — The Complete UK Fishkeeping Guide 2026
With 12 million pet fish across the UK, fishkeeping is one of our most popular hobbies. Modern LED lighting, all-in-one nano tanks, and improved filtration have made the hobby more accessible than ever — but the fundamentals of cycling, water chemistry, and species compatibility remain essential.
12m
UK pet fish
+18%
Growth since 2020
4-6wk
Cycling time
£120+
Starter tank kit
These guides cover fishkeeping and aquarium care. For concerns about the health of your fish, contact a vet with fish experience.
🐠 All Fish Guides (4)
Browse our full collection of expert guides, care sheets, and buying advice.
What Temperature Should A Fish Tank Be?→
How To Determine The Sex Of Your Goldfish→
7 Best Aquarium Fish For Beginners→
How To Clean A Fish Tank→Related: Choosing Your First Aquarium
Ready to pick your first tank? Our comprehensive UK buyer’s guide compares 10 fish tanks across beginner, community, nano and aquascape categories — with RSPCA-compliant sizing, cycling guidance and Year-1 cost tables in £: