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TropicalFish Co

Fishkeeping Blog

Practical fishkeeping advice, how-tos, and explainers. Every article is written by a real UK aquarist and backed by cited sources from FishBase, peer-reviewed papers, and trusted hobby references.

Practical Fishkeeping Advice

How-tos and guides from an experienced UK aquarist

School of neon tetras in a planted community aquarium
10 min

Best Tropical Fish for Beginners (UK Guide)

UK guide to the best tropical fish for beginners. 5 hardy species, full compatibility table, week-by-week stocking plan for a 100L community tank.

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Mature planted aquarium with healthy fish — the result of a properly cycled tank
9 min

Fish Tank Nitrogen Cycle: The UK Beginner's Complete Guide

Cycle a new aquarium properly before adding fish. UK guide covering fishless ammonia cycling, day-by-day timeline, troubleshooting, and the best test kits.

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Planted tropical aquarium ready for newly acclimated fish
8 min

How to Acclimate New Fish (UK Drip Method Guide)

UK guide to acclimating new tropical fish safely. Float, drip, and net method, drip times by species, and what to do in the first 24 hours.

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Colourful small tropical fish in a planted nano tank
9 min

Small Tropical Fish for Nano Tanks (UK Guide)

UK guide to the best small tropical fish for nano tanks. 14 species under 5 cm with care specs, stocking examples, and compatibility table.

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Mature planted tropical aquarium — the result of a properly set up tank
9 min

Complete Tropical Fish Tank Setup Guide (UK Beginner)

Step-by-step UK guide to setting up your first tropical fish tank. Equipment checklist with prices, location rules, cycling, and a 6-week stocking plan.

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Crystal-clear planted aquarium powered by quality biological filtration
9 min

Understanding Aquarium Filtration (UK Beginner's Guide)

How aquarium filters actually work: mechanical, biological, chemical. UK guide to choosing between sponge, internal, HOB, and canister filters.

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Adult angelfish in a planted community aquarium
6 min

Angelfish Tank Mates: What Works in a Community Tank (UK Guide)

What fish can live with freshwater angelfish? UK guide to angelfish-compatible species, tank size requirements, and what NOT to add.

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Algae eater fish keeping aquarium glass clean
8 min

Aquarium Algae Control: The UK Aquarist's Complete Guide

Cure aquarium algae for good. UK guide to identifying algae types, fixing root causes, and using clean-up crew (otocinclus, amano shrimp, plecos, snails).

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Heavily planted 100 litre community aquarium with mixed species
7 min

Best Fish for a 100 Litre Tank UK

Stocking a 100L (25 gallon) tropical aquarium? Honest UK guide to species and full community examples — schooling, dwarf cichlids, peaceful biotopes.

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Small planted nano aquarium suitable for nano fish
7 min

Best Fish for a 30 Litre Tank UK

What fish suit a 30L (8 gallon) tropical tank in the UK? Honest list of species that genuinely thrive at this size, plus what to avoid. Written by a UK aquarist.

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Planted 60 litre community aquarium with neon tetras
7 min

Best Fish for a 60 Litre Tank UK

What fish suit a 60L (16 gallon) tropical tank in the UK? Honest stocking suggestions with full community examples that genuinely thrive at this size.

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Male betta fish in a community tank with peaceful nano fish
7 min

Betta Fish Tank Mates: What Actually Works (UK Guide)

Honest UK guide to betta fish tank mates. What species can live with a male betta safely, what to avoid, and tank size requirements.

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Healthy betta with full intact fins after recovery from fin rot
6 min

Fin Rot Treatment in Tropical Fish: UK Guide

How to identify and treat fin rot in tropical fish (especially bettas). UK guide covering causes, treatment with Esha 2000 / aquarium salt, and recovery.

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Healthy tropical fish swimming normally in a clear aquarium
6 min

Why Is My Fish Swimming Sideways? UK Aquarist's Guide

Fish swimming sideways or upside down? UK guide to swim bladder disorder, causes, and how to treat or prevent it in tropical fish.

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Healthy tropical fish after recovery from ich infection
7 min

Ich (White Spot) Treatment in Tropical Aquariums: UK Guide

How to identify and treat ich (white spot disease) in tropical fish UK. Step-by-step heat + medication treatment, prevention, and recovery timeline.

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Healthy heated tropical aquarium with thermometer visible
9 min

Tropical Fish Tank Temperature: The Complete UK Guide

What temperature should a tropical fish tank be? UK guide to ideal temp ranges, heaters, thermometers, and why temperature matters. Written by a UK aquarist.

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Aquarium pH test kit alongside a planted tank
8 min

Tropical Fish Water pH: A UK Aquarist's Guide

What pH should your tropical aquarium be? UK guide to ideal pH ranges by species, how to test, and safe ways to adjust pH without crashing your tank.

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