Jeremy Gay

Check out the most frequently asked questions regarding marine tanks and what goes in them, and read our experts answers to them.

Ponds are great on so many levels, they can be big, small, deep or shallow, but they don’t have to be expensive and can be quick and easy to install.

Fish-only tanks are some of the most fun marine tanks because you get to include all the cool fish that can’t be kept with live corals.

The frequency that you add fish is entirely dependently on water quality. Test your water and make sure ammonia and nitrite are zero before adding fish.

A biotope aquarium contains fish and plants that live together in the same place in nature. It replicates the habitat, water parameters and materials found there.

Much of the UK has hard water, especially the South East, but hard water doesn’t have to be a barrier to keeping tropical fish, as there are still loads to choose from.

Roller filters, also known as fleece filters, are mechanical filters that trap waste in water flowing through them using a roll of fleece.

Seahorses are some of the most recognizable marine fish, and everyone wants to keep them. They look very un-fishlike and cute, but they have their challenges.

The aim of any pond owner is to have clear, healthy water. Despite the filter’s job of trapping all that waste, a filter should actually be clean inside too.