Jeremy Gay

Due to advances in the marine hobby, it is now possible to keep fish and even corals in small tanks like the Fluval Sea Evo and other tanks of similar volume.

Cichlids from Africa’s Rift Valley are adapted to hard, alkaline water with a high pH in the wild, and should be given similar water conditions in the aquarium.

Water can look crystal clear yet still be deadly to fish and with reef tanks you have the complicated lives of corals and invertebrates and their needs to think about too.

Aquarium plants need lighting with the right spectrum if they are to be healthy and grow properly. Look inside to find out what works best.

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.