Marine

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How to keep damselfish in a marine aquarium

Neon damselfish

Damselfish are some of the most colourful, abundant, cheap and hardy fish available to the marine keeper, but they can have their drawbacks. Here’s the Swell UK Guide to Damsels. Damselfish inhabit the tropical oceans of the world and are associated with coral reefs from the Atlantic to the Pacific, the Indian Ocean, the Red Sea to the Barrier Reef, Indonesia and beyond. They’re ofte...

FAQs on protein skimmers

Keep marines and soon you'll be in the market for a protein skimmer. Here are some of the most frequently asked questions.What is a protein skimmer?A protein skimmer is a type of prefilter used on marine tanks. How does a protein skimmer work?A pump with a venturi suck in air and smash it up into tiny bubbles using a special impeller. The bubbles then rise up inside the skimmer,...

How to manage KH in a marine aquarium

Swell UK Marine Coral Advice

KH is probably the most important water quality parameter after salinity and temperature. More important maybe, than Phosphate. Corals can survive a wide range of Phosphate levels but if the KH is too low for a prolonged period, all aquarium corals will die.KH is also known as Carbonate Hardness or Alkalinity, and its the parameter which can alter the most on a daily basis. Corals use Carbon...

How to start your first marine aquarium

So you want to keep marines but you don’t know where to start? The first place to start is with the aquarium itself. How big can you go? And what do you want to ultimately achieve? Do you just want a Nemo or do you want to recreate that holiday you went on and build a dazzling living reef in your own home? Both are possible but you need the right tool for the right job. Marine tank siz...

How to aquascape a marine aquarium

An effective aquascape is key to a successful reef tank, as it dictates water flow in and around the corals, as well as providing them with places to be anchored. Get the rockwork right, populate with corals and it can look spectacular. We used to use predominantly live rock to aquascape marine aquariums. Live rock is taken from the oceans and brings with it lots of calcareous algae, bac...

Why are my corals dying?

Corals are marine animals which need light, water and food but if you’ve got all that and they’re still dying, here’s what to look for and remedy, along with some essential checks:Check that the power is onIs the tank plugged in and switched on? Has the power tripped or is there a power cut? Check that your return pump and wave-making pumps are running. Along with skimmer, reactors ...

How to reduce nitrates in a marine tank

Nitrates are produced as a byproduct of biological filtration. Ammonia (NH3) is converted by nitrifying bacteria first into nitrite (NO2) then into nitrate (NO3). Fish produce ammonia constantly and if the tank is mature, beneficial bacteria constantly convert ammonia into nitrate, which then builds up over time. The nitrate level in the ocean is about 0.42mg/l which is very low to negli...

Aquarium chillers explained

In hot British summers, water temperatures can rise too high even for tropical fish, so we use a chiller to keep the temperature down. Warm water holds less oxygen so in a heatwave the effect is three-fold, by stressing the animals, increasing their breathing but also lessening the amount of dissolved oxygen that’s available to them in the water.In marine tanks, corals can really suffer in ...

What type of fish is Dory?

Thanks to Disney’s Finding Nemo franchise the Dory name tag will stick with Regal tangs forevermore. Also known as Hippo tangs or Pacific Blue tangs, Paracanthurus hepatus are tropical saltwater fish that belong to the Surgeonfish family and come from coral reefs in the Indo-Pacific.In the wild, they can grow to 30cm/12” long, although most don’t exceed 20cm/8” in length in captivity...

What is the best lighting for a reef tank?

LED lighting provides control and adjustability, economical running costs, cool running and a small, compact form factor. Because of all of the above attributes its the most popular type of lighting for reef tanks. It does differ in controllability, brightness and spectrum depending on make and model though, and how it fits to the tank. And all LED lighting is not the same. Retrofit LED ...

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