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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: Iron oxide hydroxide is the chemical name of which product:


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.

Create an account (It's quick & easy)



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

Last post by marine_newbie
in Re: New member coming over from freshwater

ReefBase Lounge

General off-topic chat and discussions. Be yourself & join-in.

Last post by Blennie1988
in Re: Hey all this is for Prince Phillip


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

Last post by Livvie
in Re: My aquascapes

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 ajm83
in Re: GlennF's DSR tank

Tank of the month

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

Last post by Carol
in Re: I know we are new but...

General Reef Keeping

General Reef Discussions

General non-specialised reefkeeping questions & discussions.

Last post by Blennie1988
in Re: Salt

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 Livvie
in Re: Please help me start up


All reef chemistry related posts should go in here.

Last post by ajm83
in Re: Hanna HR 702 kit

Reefing News

Post links or information on any related reefing news.

Last post by marine_newbie
in Re: Hawaiian university scale up tank bred yellow tang p...

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 ajm83
in Re: Stunning soft coral reef tanks


General competitions on member chosen subjects.

Last post by DUSTYBOY272
in Re: Attempting free London Aquarium Tickets


Reefbase ID database

A database of common living things found in our reef tanks

Last post by edgey53
in Re: And what are theses

ID needed

Need help identifying something? Post a photo, video, and/or description and we'll do our best to help you out.

Last post by Charlotte89
in Seaweed ID help

Marine Fish

General Marine Fish

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

Last post by Animal
in Re: Fastest fish on earth

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 Jeff
in Re: White spot!

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 Carol
in Re: Have I a problem?

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 Animal
in Re: Juvenile lipstick tang

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 jackmyers200
in Re: My juvenile emperor angel


General Corals

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

Last post by marine_newbie
in Re: GSP HELP!!!

Soft Corals

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

Last post by michael.wheelhouse
in Re: Done my first 2 coral frags today

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 Ratvan
in Re: Fox Coral

SPS Corals

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

Last post by Toper0
in Re: ID Req'd

Azooxanthellate / Non-Photosynthetic Corals

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

Last post by Debbiem
in Re: Whats happening to my sun coral?


Marine Invertebrates

A board for marine reef invertebrates.

Last post by Livvie
in Rose tip anemone

Marine Molluscs

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

Last post by Toper0
in Re: ID Req'd

Marine Crustaceans

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

Last post by ajm83
in Re: Feeding

Marine Hardware


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

Last post by Ratvan
in Re: Red spectrum light important?

Pumps and powerheads

Pumps for returns/skimmers/reactors/etc. & powerheads/wavemakers/etc. You get the idea ;-)

Last post by Carol
in Re: Circulation pumps


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

Last post by Toper0
in Re: Trapped Air


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

Last post by smifs_reef
in Re: new setup, water change, will it work?


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

Last post by Psychotic Madman
in Re: UV Steriliser

Reef Photography


Show off your pictures of your reef.

Last post by Blennie1988
in Re: Heres my reef so guys

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 Jeff
in Clown crew


Free to a good home

A board to advertise things you're giving away to fellow reefers.

Last post by Animal
in Re: Clown Fish looking for a good home - London

For sale

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

Last post by Jeff
in Re: Frags for rehome

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 Zimvirus
in Re: Swap/sell


A request board for marine fish, corals or equipment.

Last post by smifs_reef
in Re: It5040

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 badger
in Re: Aquatic log


Useful articles on the reefkeeping hobby.

Last post by ScapeEasy
in Re: All Marine Habitat Magazine Backissues Downloads

ReefBase - Info Centre

Forum Stats Forum Stats

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Latest Post: "Rose tip anemone" ( Today at 5:53:24 pm )
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Recent Topics

Rose tip anemone by Livvie

New member coming over from freshwater by marine_newbie

GlennF's DSR tank by ajm83

Frags for rehome by Jeff

White spot! by Jeff

Smif's reef by smifs_reef

Clown crew by Jeff

Please help me start up by Livvie

Andy's Reefer 250 by smifs_reef

new setup, water change, will it work? by smifs_reef

GSP HELP!!! by marine_newbie

Salt by Blennie1988

Red Sea Max 130D - 1st "Proper" Reef by Ratvan

Gsp by lukeycjgrimes

Hey all this is for Prince Phillip by Blennie1988

Building a braceless tank by ScapeEasy

Not another newbie (MINI BEAST) by ajm83

Brown stuff appearing by ajm83

Heres my reef so guys by Blennie1988

Breeding Clown Fish by Animal

Selling my Very extremely Rare Scarlet RED (Yellow watchman Goby) Anybody interested? by Livvie

Seaweed ID help by Charlotte89

Zoa Help!!!! by Blennie1988

At last it's tank time by Ratvan

Reef Keeping News

Hawaiian university scale up tank bred yellow tang programme Feb 11, 2021 11:54:06 am by ajm83
Some good news for the sustainability of our hobby

And a vid of the babies  8D
Read More
Amwell aquatics Oct 24, 2019 1:01:59 am by Animal
Just thought I'd let you know that amwell aquatics which is based at thornwood Essex will be closing down for good .they are moving all their stock to their other shop in Cambridge
Read More
Guppys oh my god. Oct 17, 2019 9:14:31 am by Animal
AS you all know I do love a challenge,I've got a friend in the USA that has set up a small test tank and has successfully acclimatised guppys to marine .
Why I don't know lol
Read More
Another Palytoxin victim Aug 7, 2019 4:59:04 pm by ajm83
The adults, first hit by the toxins, spent one week in hospital. Katie's three girls, who were asleep, were discharged the day after.

Katie added: "We had gone on
Read More
World Reef Day June 1st Jun 2, 2019 10:29:02 am by Gav
A little late , but thought I'd bring attention to this either way
Read More
Calcium and Mag testing May 16, 2019 7:02:28 pm by geordie
Saw this write up and thought i would share,a bit of a way to go but sounds promising. Made in the USA you can google images and further write ups.

We didn't want to ann
Read More
A.M Aquatics closed down Apr 19, 2019 2:35:30 pm by geordie
Hi a shame to see the above lfs has decided to call it a day,been shut a few weeks now. Always enjoyed a visit Ash and Alan always helpful, will be a miss.
Read More
New : Redsea reefled Apr 4, 2019 2:42:42 pm by Gav
Read More