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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: How many times more basic is 8.4 over 8.3?


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 Mol_PMB
in Re: New to the game...

ReefBase Lounge

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

Last post by Marty
in Re: Marty's Stock Rod Build


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

Last post by fr499y
in Re: Some inspiration needed..

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 Marty
in Re: TOTM September 2016 - voting

General Reef Keeping

General Reef Discussions

General non-specialised reefkeeping questions & discussions.

Last post by kevin
in Re: Live rock

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 Asco1104
in Re: ro water


All reef chemistry related posts should go in here.

Last post by Gav
in Re: High silicates, This could be the Answer

Reefing News

Post links or information on any related reefing news.

Last post by ajm83
in Re: Lobster with 'pepsi' tattoo

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 HK_Fuey
in Re: David Saxby reef


General competitions on member chosen subjects.

Last post by HK_Fuey
in Re: Most charaterful creature vote


Reefbase ID database

A database of common living things found in our reef tanks

Last post by Gav
in [BAD] Teddy Bear Crab

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 Jonjamess
in Re: Is this a brain coral? It was sold to me as an acan ...

Marine Fish

General Marine Fish

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

Last post by Asco1104
in Re: purchasing fish online?

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: Valentini Puffer

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 Dannyboy1302
in Re: Picasso clownfish marks

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 fishface
in Re: Adding yellow tangs

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 Jimmyson
in Re: Aiptasia's in zoa colony

Soft Corals

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

Last post by Paddy
in Re: Toadie question

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 ajm83
in Re: Can i trim LPS?

SPS Corals

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

Last post by fr499y
in Re: Birdsnest,very easy to keep and frag

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 fr499y
in Re: Red Linckia Starfish squirting?

Marine Molluscs

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

Last post by Gav
in Re: Berghia Verrucicornis

Marine Crustaceans

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

Last post by fr499y
in Re: Possible rogue cleaner shrimp

Marine Hardware


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

Last post by deano123
in Re: Lighting

Pumps and powerheads

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

Last post by fr499y
in Re: Skimmer pump


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

Last post by Asco1104
in Re: D-D Calcium reactor set up


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

Last post by fr499y
in Re: Macro algae in juwel filter box


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

Last post by ajm83
in Re: Redsea 130d

Reef Photography


Show off your pictures of your reef.

Last post by jordanweasel
in Holiday in the Indian ocean video

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 Gav
in Re: How to get good picture of corals??


Free to a good home

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

Last post by Paddy
in Re: selection of goodies - Alk, Cal, Mag Test kits - Ree...

For sale

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

Last post by Chris E
in Re: Set up for sale

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 Enzo montini
in 5.5ft x2ft X1.5


A request board for marine fish, corals or equipment.

Last post by Fishymo
in 4ft Tank / Setup

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 Universal Hanging Bar Offer

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 Asco1104
in Re: Cartridges needed for Kent Marine Hi-S (the Maxxima ...


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


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 Ocean Revive Artic T247 (S026B) Dimmable Marine...

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 jordanweasel
in Re: Weir comb


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 ajm83
in Re: Metals+, iron level drops quickly

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

ReefBase - Info Centre

Support ReefBase

We don't display ads, and suppliers of the forum don't pay us a penny.

Any donation of any amount really helps offset the running costs.

Recent Topics

GlennF's DSR tank by ajm83

Set up for sale by Chris E

Ady,s 42x30x20 reef by fishface

New to the game... by Mol_PMB

Aiptasia's in zoa colony by Jimmyson

ro water by Asco1104

Pj cardinal nipping my new coral by Asco1104

chamber set up by kevin

Holiday in the Indian ocean video by jordanweasel

Marty's Stock Rod Build by Marty

Reef stock for a begginer. by HK_Fuey

Live rock by kevin

4ft Tank / Setup by Fishymo

Planning a new tank, something a bit different... by Mol_PMB

Help me out here ... what is going on by chilliman

Graeme's 6x2x2 900L by HK_Fuey

help need in Hospice tank by jumpinginatthedeepend

Paddy's first marine tank by Paddone

Salinity by Asco1104

Is this a zoa? As in the ones that have palytoxin? by fr499y

Some inspiration needed.. by fr499y

Maths help.. salinity by Asco1104

Which boiler? by Gav

Live Rock by Stib

It's that time again charity sea match by Marty

water change by fr499y

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

Is this a brain coral? It was sold to me as an acan lord. by Jonjamess

Starting Marine - Help by Asco1104

Reef Keeping News

Lobster with 'pepsi' tattoo Nov 30, 2017 4:15:15 pm by Gav
Read More
GBR Coral breeding program Nov 26, 2017 5:09:13 pm by Gav
Read More
Mexico creates huge national park Nov 25, 2017 8:54:30 am by Gav

Mexico creates huge national park to protect marine life -
Read More
More acidic oceans will affect all sea life Oct 27, 2017 5:28:50 pm by Gav

More acidic oceans 'will affect all sea life' -
Read More
Marine shows in the UK Sep 14, 2017 10:15:34 pm by Heather Domrow
Are there any shows open to the public at places like the NEC or Earls Court for marine fish/coral keeping? Thanks.
Read More
Belize coral reef restoration Aug 22, 2017 2:45:48 pm by Gav
Read More
Robotic Deep Sea Explorer Uncovers Treasure Trove of Freaky Marine Life Aug 8, 2017 11:46:50 am by HK_Fuey

Read More
Pilot whale stranded N Kessock Aug 8, 2017 9:23:15 am by Gav
Pilot whale stranded at North Kessock has to be put down
Read More
Killer amphipods attack!!! Aug 7, 2017 4:20:03 pm by HK_Fuey

Read More