Coldwater aquariums are as colourful, lively, and rewarding as any tropical ecosystem. With the right approach, they’re simple to set up and maintain, creating the perfect environment for keeping coldwater or temperate fish. This guide will walk you through everything you need to know, from tank choices and equipment through to stocking and long term care.

We are so lucky in fishkeeping that we have so much colour and variety in fish. There are 32,000 fish species that we know of and they have every colour and pattern.

Algae itself is a natural phenomenon. Wherever there is light and water there is algae, and algae has been on Earth for a billion years.

“Swimbladder,” is a common ailment in aquarium and pond fish, especially fancy goldfish. The swimbladder is an air-filled organ inside the fish.

It is said that although some corals survive without light, no corals can survive without flow. Water flow brings corals their food and washes away their waste.

Brown algae can be a plague that ruins the look of a reef tank and can cause the owner to pull their hair out, and is most common in young reef tanks.

Hardy fish are often recommended to new fishkeepers as they are tolerant of small mistakes here and there and are easy to keep.

External canister filters are the filter of choice for aquariums over three feet in length and combine mechanical, biological, and chemical filtration.

Flatworms can be a pest in reef aquaria and if left alone they can multiply and reach plague proportions. Here’s how to control them.