Tropical Fish Tank Set-up: A Beginner's Guide

A tropical aquarium is a relaxing, colourful addition to any home. The secret to success is patience: set the tank up properly and let it mature before adding fish.

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1. Tank, filter and heater

Choose a tank on a level, sturdy stand away from direct sunlight and radiators. You'll need a filter sized for the tank and an aquarium heater to keep the water at a stable tropical temperature, plus a thermometer to check it.

2. Substrate, décor and plants

Rinse gravel or substrate before adding it, then add rocks, wood and plants to give fish places to hide.

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3. Treat the water

Tap water contains chlorine and chloramine that harm fish, so always use a water conditioner when filling and topping up.

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4. Cycle before stocking

A new filter needs time to build up beneficial bacteria that break down fish waste. Run the tank for several weeks, test the water and add fish gradually, a few at a time.

5. Feeding

Feed small amounts that are eaten within a couple of minutes. Overfeeding is one of the most common causes of poor water quality.

Ready for fish? See our tropical and coldwater fish for sale in Cornwall page.