YOUR EVERYDAY FIELD GUIDE

Discover the world on the other side of the glass.

Fishes / Behaviour

Why Is Your Marine Fish Gasping For Air?

A fish hovering at the surface, gill covers flaring rapidly, or hanging near a powerhead outflow, is telling you something urgent about oxygen. Marine tanks are more prone to this problem than freshwa

2 min read

Fishes / Behaviour

Phosphates in a Saltwater Tank: Why They Build Up and How to Bring Them Down

Phosphate rarely gets the same attention as ammonia or nitrite, but in an established saltwater aquarium it is one of the two nutrients, alongside nitrate, most directly responsible for nuisance algae

2 min read

Fishes / Behaviour

Schooling Fish: Why Numbers Matter in Your Aquarium

Species like tetras, danios, rasboras and barbs are frequently sold as single fish or in small pairs, which misses the point of what these fish actually need to display natural, healthy behaviour.

2 min read

Fishes / Behaviour

Aquarium Lighting Basics: Why LED Fixtures Make Sense

Lighting does more than let you see your fish. It drives photosynthesis for any live plants, influences fish colouration and natural behaviour, and, handled poorly, is one of the biggest contributors

2 min read