Jeremy Gay

We often divide freshwater fish into two types - tropical and coldwater, but what defines a tropical fish, and what temperature is tropical?

Planted tanks can be some of the most beautiful aquariums, and live aquatic plants can benefit fish too. Is CO2 essential for a planted tank?

GH is an abbreviation for General Hardness, and it's a reference to how hard or soft your water is, so how do we lower GH?

Need to change your aquarium filter but worrying about crashing your cycle? Read our useful guide on how to do it without losing precious beneficial bacteria.

Black beard algae (BBA) is a horrible, tenacious algae which is unsightly and hard to get rid of. It typically grows on the edges of the leaves of slow-growing plants.

The pH of freshwater varies around the world, and most fish have adapted to live and breed in a narrow band of pH values, so how do we increase it?

Green water is made up of millions of tiny algae cells all floating around in the water. They are green because of the chloroplasts inside them which photosynthesize and turn sunlight into energy. Just like plants.

Cycling is the single most important phase that any aquarium goes through, making sure your water is safe to add fish. Here’s how to do it.

Snails are one of the most notorious pests in home aquariums, usually introduced on live plants. Read our helpful guide on how to control them.