Welcome to Think Fish

The online tropical fish resource for everything you need to know about freshwater aquarium fish and tropical fish keeping

Tools and Calculators

fish tank calculator

Work out a fish tanks...everything

Use our calculator tools to work out a fish tanks volume, weight, surface area and stocking level.
All the conversions and formulas you need.
USE THE FISH TANK CALCULATORS

Recent Blog Posts

Creative uses for old tanks

30th Nov 2013

Now article added - Creative uses for your old fish tanks
READ MORE

New 'Think' Pet Sites

25th May 2013

Now joining Think Fish are four new pet sites - Think Animals, Cats, Woof, and Reptiles.
READ MORE

Think Fish Re-Design

25th May 2013

Forum

Visit our forum and join a discussion

A good place to find some helpful fish keepers and ask, or answer, a few fish keeping conundrums
VISIT THE FISH FORUM

Fish Profiles & Compatibility

guppy fish on black

siamese fighting fish fish on black

platy fish on black

molly fish on black

cardinal neon fish on black

Searchable Fish Profiles

Find the right tropical fish for your aquarium from our fish profiles
SEE FISH PROFILES

Community Creator

Add your chosen fish to our web app and see if they are compatible
GO TO COMMUNITY CREATOR

Species Articles

Find out more about popular fish

Get some detailed information on the hobbys most popular and interesting fish.

Corydoras Catfish
You can't miss the Corydoras group of catfish - there are over 100 species!

Danios
A lively, peaceful, shoaling fish suited to a range of conditions

Small Barbs
Not the 'nippy' fish you might think. Small barbs are excellent for communities

Freshwater Sharks
Not quite "Jaws", but some of these fish certainly have issues in a community

Siamese Fighting Fish
Everybody want's to keep Siamese Fighters, but few aquariums are suitable

Rainbowfish
Don't dismiss those dull, silvery fish in the shop. Rainbows mature with age

Coldwater Fish
Goldfish are far from a good aquarium fish, but there are lots of alternatives

Angelfish
One of the most popular fish, but Angels require the right tank to thrive

Fish Starter Guides

Start keeping fish the right way

Keeping tropical fish can be a tricky hobby, heres some articles which should help

Fishkeeping Rules
Ten golden rules to follow which will help improve your fish keeping

Finding A Good Store
Is your local fish shop (LFS) any good? - And are you a good customer?

Feeding Your Fish
Proper feeding is essential for good health. Getting it wrong can be disastrous

Introducing Fish
Moving fish between tanks is very stressful, and must be done properly

Planning An Aquarium
Where will you put your tank? What size, style or shape is best?

Choosing Right Fish
How do you pick the right fish when visiting your retailer? Heres some tips

Visit The Family

Think Fish has animal relatives!

Visit our other pet sites for the same quality content

Featured Articles

Interesting aquarium fish & fish tank articles

Increase your fish keeping knowledge with our interesting collection of articles
SEE MORE ARTICLES

Cycling Your Tank
Cycling aids maturation, but should this be done with or without fish?

Choosing First Fish
Your first fish must be hardy, sociable, and oddly confident.

Isolation Tanks
Some experts swear by quarantine tanks, but are they worth the effort?

Keep Fish Healthy
Are your fish as healthy as possible? Find out what keeps a fish in top form

Controlling Snails
Snails are a common problem, but there are effective solutions

Why Fish Shoal
It's not just a sales tactic, some fish really do need to be in groups

DISCUSS THIS PAGE

Have a question about this page? Do feel free to ask our experts.We have 1000's of posts about the very topics you're interested in covering all aspects of tropical fish; their habitats, best ways to keep them thriving, where to buy from whom and more! Hope to see you soon in the upgraded Tropical Fish Forum!

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Featured Pages

Fishkeeping Rules
Ten golden rules to follow which will help improve your fish keeping

Stocking Levels
There is a standard rule for stocking levels - which is very wrong. Get updated!

Feeding Your Fish
Proper feeding is essential for good health. Getting it wrong can be disastrous

Natural Decor Is Best
Fish are healthier when kept in natural settings. Heres how to go natural

Controlling Snails
Snails are a common problem, but there are effective solutions

Keep Fish Healthy
Are your fish as healthy as possible? Find out what keeps a fish in top form

Why Fish Shoal
It's not just a sales tactic, some fish really do need to be in groups

Marine Fish
Thinking about keeping marines? This guide will get you on the right track

Angelfish
One of the most popular fish, but Angels require the right tank to thrive

Siamese Fighting Fish
Everybody want's to keep Siamese Fighters, but few aquariums are suitable

Plant Care Basics
Plants have many positive effects on an aquarium. Get started here

Algae Prevention
Prevention is better than cure - Heres how to prevent algae disasters