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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: Hydrogen sulfide is most likely to form


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 ajm83
in Re: Re: New to the forum

ReefBase Lounge

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

Last post by fr499y
in Re: Young Driver Car Insurance


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: Fr499y's Jungle

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 afcajax73
in Re: Andys 52L sea evo

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 The land shark
in Re: Water changes Yes or No?

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 Barney67
in Re: Nitrate high


All reef chemistry related posts should go in here.

Last post by Asco1104
in Re: Phosphate test kits

Reefing News

Post links or information on any related reefing news.

Last post by smifs_reef
in Re: How gene editing can save coral reefs

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: Stunning soft coral reef tanks


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 ajm83
in Re: ID -Some sort of Nudibranch?

Marine Fish

General Marine Fish

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

Last post by ajm83
in Re: Goby jumping to his death

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: How to cure Marine White Spot, Ich, Cryptocaryon Irr...

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 Gofro
in Re: Paired couple now fighting

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 Paddy
in Re: Mixing 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 Asco1104
in Re: Nice coral for shaded area

Soft Corals

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

Last post by HK_Fuey
in Re: Leather Coral

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 Gofro
in Re: Duncan’s coral retracted

SPS Corals

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

Last post by HK_Fuey
in Re: Acropora STN

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 HK_Fuey
in Re: Is this a little brittle star?

Marine Molluscs

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

Last post by Berghiaworld
in Re: Berghia Nudibranch

Marine Crustaceans

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

Last post by Gav
in Re: How to identify a true peppermint shrimp

Marine Hardware


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

Last post by HK_Fuey
in Re: kent marine 97lt tank

Pumps and powerheads

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

Last post by chilliman
in Re: Pump for water changes


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

Last post by Asco1104
in Re: Apex controllers....


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

Last post by smifs_reef
in Re: Skimmers stopped producing bubbles??


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

Last post by rusty_uk
in Re: AIO Sump layout

Reef Photography


Show off your pictures of your reef.

Last post by Stevie B
in Re: My nem

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 Mike
in Re: Mobile webpage photo uploading


Free to a good home

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

Last post by Mike
in Re: Needs a new home

For sale

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

Last post by Mike
in Re: RO Filter Media

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 jamiedb1977
in my kessil a360we x2 with controller for your radion or h...


A request board for marine fish, corals or equipment.

Last post by HK_Fuey
in Re: Microhabitat 60

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/Semigrow IT50 V2 Series

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 HK_Fuey
in Re: Colombo - Bacto balls

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

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

Water changes Yes or No? by The land shark

Nitrate high by Barney67

Andys 52L sea evo by afcajax73

RO Filter Media by Mike

Phosphate test kits by Asco1104

DIY Aquaroche by seancr1

ID -Some sort of Nudibranch? by ajm83

Mixing tangs by Paddy

What is this? by Karen

IT5012 AuqaOcean LED Marine Lighting System by Paddy

Re: New to the forum by ajm83

GlennF's DSR tank by glennf

Zoas ! by Hai

Microhabitat 60 by HK_Fuey

Acropora STN by HK_Fuey

Evolution Aqua eaReefPro 1500S by Zirrel

Vortech MP40w Quiet-Drive Pump by Zirrel

Maxspect Gyre XF250 Controller and 2 XF250 Pumps by Zirrel

Moving plan and stocking idea for a 4x2x2 tank by soulman

Evergrow/Semigrow IT50 V2 Series by marinefarm by marinefarm

Fine Filtration RO/DI units by The land shark

AIO Sump layout by rusty_uk

Apex controllers.... by Asco1104

Adys final upgrade xl425 reefer by smifs_reef

Vectra and reeflink query by The land shark

New to saltwater, filtration question. by saltyshoes

Hello again! Been a while.... and here's a cheap alternative to Seneye wifi web server... by Hai

Skimmers stopped producing bubbles?? by smifs_reef

Tims first and last upgrade by afcajax73

Bacteria in a bottle = snake oil? by Paddy

Second opinion please by arnie

Young Driver Car Insurance by fr499y

Aquascaping inspiration needed by Mayo

EVO 52L Help? by Mike

Berghia Nudibranch by Berghiaworld

Reef Keeping News

Robo fish to study the world's reefs Mar 22, 2018 8:33:47 am by HK_Fuey

The main reason this little fish was developed was to observe different species of fish unobtrusiv
Read More
Scientists discover new fish Mar 21, 2018 11:37:15 pm by HK_Fuey
Read More
A look inside TMC London Mar 18, 2018 7:00:38 pm by Asco1104
Interesting to see we’re the majority of are supply of stock comes from.

Unfortunately it’s not in English but there are subtitles

Read More
Coral Food Which is Invisible to Protein Skimming Mar 13, 2018 10:04:26 pm by HK_Fuey
Really?  How does that work then?
HyperCoral GC is a new reef aquarium supplement which is formulated to provide total nutrition for aquarium corals. With a complete su
Read More
New Ecotech uk distributor Mar 4, 2018 11:38:03 pm by Asco1104
If you need support for ecotech this is the new distributor.

Hello from Xodis the new Ecotech Distributor in the UK
Read More
Fiji ban Dec 30, 2017 12:55:44 am by HK_Fuey
Read More
Damaged Scottish reef 'biggest of its kind' Dec 29, 2017 9:08:54 am by Gav
Something closer to home

Damaged Scottish reef 'biggest of its kind' -
Read More
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