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ReefBase Reef Quiz

Play the ReefBase Reefing Quiz!

20 Questions from easy to not-so-easy. Have fun & good luck!

Example Question: An ORP probe is most useful if;


ReefBase is a Marine Fish keeping & Coral Reef Aquarist Community Forum based in the UK. Join ReefBase for help & advice or to contribute your own knowledge & experience of keeping a Marine Coral Reef Aquarium.

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If you're new to ReefBase, come and introduce yourself.

Last post by HK_Fuey
in Re: Starting again .....10 years on.


A general board for the discussion of freshwater fish, tanks and freshwater specific equipment, such as CO2 kits, etc.

Last post by Carol
in Re: Little spawning

Members Tanks

Browse our members' tank threads, view progress and pictures, or create your own thread to track the progress of your own reef aquarium.

Last post by Carol
in Re: Gav's Aqua Oak

Tank of the month

Monthly competitions on member's tanks. Enter pictures of your tank and / or vote on others'.

Last post by Marty
in Re: TOTM September 2016 - voting

General Reef Keeping

General Reef Discussions

General non-specialised reefkeeping questions & discussions.

Last post by Gav
in Re: Tank Tested

Beginners Questions

If you're new to the hobby, please ask any questions you have, rather than making the mistakes we've all made.

Last post by chilliman
in Re: id pls

Reefing News

Post links or information on any related reefing news.

Last post by Carol
in Re: Great Barrier Reef is under severe stress – but not ...

Stunning Reef Tanks

A collection of the most beautiful reef aquariums from anywhere on the net. Post links and a brief summary of what captivated you most by the tank. Inspiration for us all.

Last post by Carol
in Re: David Saxby reef


General competitions on member chosen subjects.

Last post by HK_Fuey
in Re: Most charaterful creature vote

Marine Fish

General Marine Fish

A general board for all Marine fish, for Marine Fish identification, and general discussion.

Last post by scruffy_77
in Re: Wrasse died :(

Marine Fish Diseases

A board for threads related to marine fish diseases including; White Spot (Ich), Brooklynellosis (Anemonefish Disease), Marine velvet, black spot, HLLE, Fin Rot, etc. Their diagnosis and treatment.

Last post by HK_Fuey
in Re: Regal has ws

Clownfish & Damselfish

Clownfish and other Damselfish, including Clarkii Clownfish, Common Clownfish (Nemo), Skunk Clownfish, Electric Blue Damselfish, Domino Damselfish are in this category.

Last post by HK_Fuey
in Re: I'd my clown fish please

Tangs / Surgeonfish

Discussions regarding Tangs aka Surgeonfish. Fish such as Yellow Tangs, Regal Tangs (Dory), Naso Tangs, Clown Tangs, etc fall into this category.

Last post by Steve's Marines
in Re: Yellow tang behaving strangely!

Angelfish (Large & Dwarf)

For topics about Angelfish & Dwarf Angelfish. For Fish such as the Queen Angelfish, Emperor Angelfish, Coral Beauty & Flame Angel.

Last post by Marty
in Re: Emporer anglefish


General Corals

A general board for all Corals & Anemones, for Coral identification, and general discussion.

Last post by Carol
in Re: What is this

Soft Corals

Soft corals. Corals without a skeleton. These include Leather Corals, Pulsing Xenia, Zoanthids, Mushrooms, etc.

Last post by Angrymac
in Re: Melting zooanthids

LPS Corals

Large polyp stony corals. Any corals with a calcium based skeleton, and large polyps which extend out to completely conceal the skeleton beneath.

Last post by Marty
in Re: Torch Coral Questions - funny tentacles

SPS Corals

Small polyp stony corals. More advanced corals which have calcium based skeletons and small polyps.

Last post by Marty
in Re: Sps growth rate

Azooxanthellate / Non-Photosynthetic Corals

Azooxanthellate or non-photosynthetic corals do not require much if any light to survive. They include Gorgonians and Sun Corals.


Marine Invertebrates

A board for marine reef invertebrates.

Last post by Hai
in Re: Algie in sump

Marine Molluscs

Marine gastropod molluscs including; Seahares, Turbo snails, Nassarius snails, and predatory snails such as Sundial snails & some Nudibranchs.

Last post by Carol
in Re: Living Dangerously

Marine Crustaceans

Marine Crustaceans as in Porcelain crabs, Mithrax crabs, cleaner shrimps, blood shrimps, boxer shrimps, etc.

Last post by Shain Hunton
in Re: Copepods

Marine Hardware


Discussions surrounding marine & reef lighting, Metal Halides, CFLs, T5s or LEDs.

Last post by Carol
in Re: Kelvin Rating for coral growth


A board for more specialised equipment such as dosing pumps, kalkwasser stirrers, calcium reactors, etc.

Last post by HK_Fuey
in Re: Maxispect gyre xf150


Marine Hardware Do-It-Yourself. A board containing topics about building & customising your own equipment.

Last post by fr499y
in Re: Drilling


Discussions about Filtration, protein skimmers, uv sterilisation, ozone usage, nitrate reactors, biopellets, etc.

Last post by Marty
in Re: Ozone or Uv

Reef Photography


Show off your pictures of your reef.

Last post by Asco1104
in Re: Hermit Crabs that live inside Astreopora Coral

Photography Advice & Tips

If you need help getting good photos of your marine tank, fish or corals. Ask for advice here, please include camera model, as it helps to understand what features are available to you.

Last post by Jessica
in Re: What camera to buy?


For sale

A board to advertise your reefing equipment and livestock for sale.

Last post by lee.williams
in Re: 4ft Tropical tank (opti white)

Swap Shop

A swap shop. A place for ReefBase members to offer frags, Corals, Zoanthids, Fish or equipment in exchange for other items.

Last post by hixy
in Swap kessil a160we for Chinese led


A request board for marine fish, corals or equipment.

Last post by Asco1104
in Male Naso Tang

Reef Keeping Suppliers

Become a Supplier

There's no sponsorship model on ReefBase. For members it means there's no bias towards vendors who are supporting the forum financially, so everyone is free to talk openly about products, whether they're a supplier here or not. For you it means there's no fee, and you can advertise your products or service and interact with UK Reefkeeping hobbyists.


iQuatics Online is the UK’s leading supplier of innovative aquarium lighting products.

Last post by iQuatics-Online
in 50% off the Series 2 Aqualumi & Free Express Delivery - ...


Reefloat Auto Aquarium Products

Last post by reefloat
in reef and coldwater

UK Marine Lighting

The UK's Marine LED lighting specialists. Providing quality LED lighting to suit all budgets & aquariums.

Last post by ukmarinelighting
in Evergrow LED Lighting sale now on at UK Marine Lighting

Reef Perfect

Reef Perfect is the UK’s leading supplier of aquarium cooling and control products for private and commercial customers alike.

Last post by Mike
in Re: Hows it going ReefPerfect?


Fistafiltration specialise in acrylic aquarium manufacture, and filtration such as sumps and reactors. FistaFiltration has been supplying acrylic tanks and products for over 20 years.

Last post by fizzy
in Re: fish display


MailOrderCorals are one of the leading suppliers of Marine Corals and Inverts in the UK. With over 4,000 Corals & Inverts ready for delivery direct to your door with our live arrival guarantee.

Last post by T-Bone Tyrone
in Re: Holiday

RO World

A UK supplier of high quality aquarium RO units. With a vast range of reverse osmosis accessories at unbeatable prices with quick delivery.

Last post by Marty
in Re: Some advice please


Fishmansfrags has been a market leader of UK mail order marine corals, frags and livestock since 2005 and is possibly the most popular and best priced retailer of marine corals and critters online today!

Last post by fishmansfrags


Reefphyto Ltd is a reliable source of quality Live Phytoplankton, Rotifers, Copepods (Zooplankton) all cultured and grown at our premises in the UK.

Last post by HK_Fuey
in Re: Live Food Discount for ReefBase Forum Subscribers

Bit O' Blue

Bit O' Blue is a complete store for the marine aquarist holding fish, corals, inverts and all necessary associated dry goods.

Last post by HK_Fuey
in Re: Bit O' Blue - Will be deleted shortly


We are suppliers of marine fish, coral, inverts and tank equipment. Using the equipment we also sell helps us to understand the customers requirements in maintaining a healthy aquarium.

Last post by marinefarm
in Evergrow D2120 sale

Aquarium Plumbing Ltd

We specialise in UPVC aquarium plumbing and fittings. All of our aquarium plumbing is fish and invert safe and can be used in fresh or salt water systems. We supply imperial and metric systems which are compatible with Deltec, Aqua Medic and any other European equipment.

Last post by Mike
in Re: Welcome to Aquarium Plumbing Ltd - our newest suppli...


Our marine products are both high quality and user friendly and have just one goal - to produce a successful healthy marine aquarium with stunningly beautiful corals and fish

Last post by Colombo
in Re: New Colombo Phytoplankton

Reefing Tools & Articles


A board for how-to guides on any area of the reefkeeping hobby.

Last post by T-Bone Tyrone
in Re: How to wire an STC1000 temperature controller with 2...


A board for polls to appear on homepage

Last post by T-Bone Tyrone
in Re: How often do you feed?


Dosing calculators, tank size calculators, etc.

Last post by Carol
in Re: Aquatic log


Useful articles on the reefkeeping hobby.

Last post by HK_Fuey
in Re: Iron

ReefBase - Info Centre

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Recent Topics

id pls by chilliman

RO water unit by hixy

New Colombo Phytoplankton by Colombo

Cynobactaria by britdog

Gav's Aqua Oak by Carol

Just thought I'd share a pic by fr499y

Tank Tested by Gav

Toadstall help by HK_Fuey

Fr499y's 4 footer mixed reef by Carol

Gollies Kent Marine 94L 'new tank' thread by Carol

Wrasse died :( by scruffy_77

GlennF's DSR tank by damienpbuckley

Graeme's 6x2x2 900L by HK_Fuey

What is this by Carol

Kelvin Rating for coral growth by Carol

LEDs??? by Ashleigh Weaver

Little spawning by Carol

Bubble Magus Q3 by hixy

reef and coldwater by reefloat

Reef Keeping News

Great Barrier Reef is under severe stress – but not dead yet Oct 15, 2016 8:10:56 am by Gav
The Great Barrier Reef is under severe stress – but not dead yet

Read More
Sapphirina Copepods - Vanishing act Oct 8, 2016 1:45:15 am by Mike
These copepods are transparent, but like cuttlefish, use pigments in their "skin" to show colour, but then "switch it off" to perform their vanishing act.

Watch this Nat
Read More
Show tanks from MACNA 2016 Sep 23, 2016 9:41:09 pm by HK_Fuey
Read More
Fish recorded singing dawn chorus on reefs just like birds Sep 22, 2016 11:16:11 am by HK_Fuey

Read More
Life on an underwater volcano Sep 19, 2016 4:11:36 pm by HK_Fuey
Read More
Sea snails could save barrier reef from starfish Aug 25, 2016 8:30:59 am by Gav
Sea snails could save Great Barrier Reef from starfish -
Read More
Googly eyed purple squid sighting Aug 17, 2016 9:16:48 am by Gav
Read More