Marine

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How many marine fish in a 60-litre tank?

An aquarium set makes a great Christmas present

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. The factors that affect how many you add include the age of the tank, maturity of the filter, the type and size of the filter, if it has a protein skimmer running and of course the eventual size of the fish themselves. Let’s start with th...

What test kits do I need for a reef tank?

One of the best investments you’ll ever make in fishkeeping is in test kits. 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. Run a reef tank without testing and you’re running one blind. Nutrients will build up and elements will degrade, resulting in seawater that isn’...

What is the best food for marine fish?

Marine fish have evolved to take advantage of all the different types of food that are available in the ocean. Foods vary from phytoplankton to zooplankton, macroalgae to mobile invertebrates, coral polyps and even other fish. Some fish are omnivores and are easy to feed in our aquariums, while others are specialists which struggle to feed on items that are different to what they would find in th...

What order should I add livestock to my marine tank?

Reef tanks take time to mature and within that time conditions may not necessarily be at their best for all inhabitants. Because of this, we mature tanks slowly, adding livestock a bit at a time. We add the hardiest creatures first and the most sensitive ones last. Mature the tank firstThe first water quality issue will be ammonia and no living creature should be exposed to that. Fis...

What do I need to set up a marine aquarium?

Marine fish tanks are so cool, and there’s no better hobby to start while you’re stuck at home. Here’s what you’ll need:TankChoose a model from 50-500 litres to get you started, but note that you’ll need a tank of 300 litres and 120cm in length minimum to keep Tangs long term.LightIf you want live corals and anemones you need good light. Choose high-powered controllable ...

How to set up a protein skimmer

How to set up a protein skimmer

There are lots of protein skimmers available for marine tanks, and they have many benefits including increasing oxygen levels and reducing nutrients. But which one is right for your tank, and how do you set one up?There are several types of protein skimmer: Internal, hang-on, and sump based, with sump based skimmers sub-dividing again into internal (which sit inside the sump,) and external, w...

How much light for a reef tank?

Swell UK Marine Coral Advice

Coral reefs occur naturally in some of the sunniest places on earth, but light is changed when it travels through seawater. Sunlight can be regarded as full spectrum, but as soon as it hits the water some of that spectrum is filtered out. First to go is the red spectrum, followed by orange, yellow and green. Violet is also filtered out eventually, but blue light penetrates deep and is the last li...

How much water should I change in a reef tank?

The oceans are unrivalled in their size and stability, and the corals we keep have evolved to that very, clean, pure, stable environment. In a closed aquarium we may start off with good saltwater but it quickly depletes and degrades its chemical values. Pollutants build up too, so we need to change the water.Water changes are vital to the success of most reef aquariums. They dilute nitrates a...

How to get rid of bubble algae in a reef tank

Bubble algae is a bottle green single-celled algae which forms jelly bean or round, marble-like shapes in the marine aquarium. It often starts at the base of corals but can plague if uncontrolled, blocking pumps, weir slots and overgrowing corals. Large growths can be removed by hand but there is one specific critter that reefkeepers use to deal with it. The Emerald Crab, Mithrax sculptu...

How to raise pH in a reef tank

Swell UK Marine Coral Advice

For the new reefkeeper, pH shouldn’t be made a priority. Once corals are added it is KH which has greater immediate importance because it drops quickly, and drops to a level which is detrimental to coral health. But get into your stride with the management of KH, Calcium, Magnesium, nitrate, phosphate and other supplements and pH can definitely come back into play. The pH of the ocean ...

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