Ask the Expert Archive

The carbon in the filter removes contaminants and chemicals from the water.

External wounds and infections can be treated with a number of fish medicines, such as Ulcer & Open Wound Control.

This could be caused by a number of things, such as a swim bladder problem, constipation, or an internal infection.

There are hundreds of reasons why some of your fish may have died. You need to review everything that may have occurred

Cotton wool-like growths are usually a sign of a fungal infection. Fungus is a common fish disease that can prove fatal if not treated early. Fungus is usually a secondary infection that follows on from a previous infection or parasite. They are opportunists, and try to infect wounds or abrasions on the fish skin. Fungal [...]

This could be a problem with the swim bladder. The swim bladder is a small organ inside the fish that can fill up

For most treatments, the answer is definitely no. You should never use more than one fish medicine at a time

If you have no plants or ornaments in your aquarium, then it is a good idea to add some.

This could be caused by a number of factors, however it is usually caused by leaching from aquarium gravel or bogwood in the aquarium.

Cloudiness is usually caused by a bacterial bloom – which are usually harmless.

The biochemical function of the aquarium filter is to remove harmful substances from the water by biochemical reaction.

Green algae can be filamentous algae that attach itself to something in the aquarium

‘Algae’ is a general term used to describe many types of aquatic plant life. Algae is present in almost every body of water on earth

pH is a measure of the activity of hydrogen ions (H+) in a solution. The pH value is a number without units, on a logarithmic scale of between 0 and 14.

Tap water contains chlorine and chloramines, which are added to our water supply to act as a disinfectant.

Most aquariums should be cleaned every 2 weeks on average.