Help Guides

Ammonia is really dangerous to fish, even when as low as one part per million, and its an invisible aquarium fish killer.

Struggling with green algae? This could be due to a number of reasons. Read our helpful guide on determining the cause of and combatting green algae.

Water changes are really important for fish tanks. They lower pollutant levels and can add buffers, freshening up the tank and aiding fish growth.

Marine fish have evolved to take advantage of all the different types of food that are available in the ocean, so their foods need to be diverse.

Most fishkeepers know about the importance of cleaning filter sponges, and to only ever do it in old aquarium water, not tapwater.

Fish stocking levels rely on several factors, but if your aquarium is more than 6 weeks old and has a mature filter, here are our recommendations.

Reef tanks take time to mature and within that time conditions may not necessarily be at their best for all inhabitants.

Quarantining newly purchased fish is so important as we can’t see if they are carrying parasites with the naked eye. Read our helpful guide on how to set up a quarantine tank.

Aquascaping doesn’t have to be the sole domain of planted tank owners and literally just means landscaping underwater.