What Are The Most Small And Peaceful Fish For A 20 Gallon Reef Tank?

[reeftankdude]

Looking to add fish that can live peacefully with other fish. thanks all

 

[sfin52]

Gobies. I really love watchman, and the clown gobies.

 

[BroccoliFarmer]

Gobies. I really love watchman, and the clown gobies.

Dont think you could get much more peaceful than a PJ cardinal

 

[KeepSwimming]

Tailspot blenny!

 

[Sharkbait19]

Firefish, cleaner gobies, shrimpgobies, rainford/hector’s gobies, clown gobies, etc. Basically any goby that fits in the tank…

 

[CanuckReefer]

Is this a stock list from scratch? Nothing in tank now? Royal Gramma would be a nice centerpiece in that size tank, fairly peaceful. 20-30 gallon is recommended minimum....

 

[Sharkbait19]

Is this a stock list from scratch? Nothing in tank now? Royal Gramma would be a nice centerpiece in that size tank, fairly peaceful. 20-30 gallon is recommended minimum....

+1 royal gramma
A bit territorial but really more bark than bite.

 

[reeftankdude]

How many days apart should I add a fish? Can different kinds of Gobies get along. thanks all

 

[reeftankdude]

Is this a stock list from scratch? Nothing in tank now? Royal Gramma would be a nice centerpiece in that size tank, fairly peaceful. 20-30 gallon is recommended minimum....

Can I have more then one? Do they get along?

 

[Nemo&Friends]

firefish, banggai cardinal, pj cardinal

 

[reeftankdude]

Title should read What Are The Best, but could not find a way to edit. Thanks all

 

[Sharkbait19]

I wouldn’t do more than one gramma in that size tank. For the other fish, I’d also generally stick to one per species, as they are known to fight. I’d also look into the areas of the tank each occupy and not get too many per area (sand, rock, open water).

 

[vdubers]

+1 on the Gramma. Mine was the first fish and hes still the boss of my 300 litre. He likes to open his mouth wide and charge the other fish near his hole but they don't seem overly bothered.

 

[Hermie]

I keep a Mandarin in a 23 gallon with about 20lbs of live rock (a lot) and reverse undergravel sand bed. It's grown from 1/2" juvenile to 1.5" about and it's totally fat maybe too fat. It's totally possible and a very very peaceful fish, but your system has to be designed for it.

 

[CanuckReefer]

Can I have more then one? Do they get along?

I wouldn’t do more than one gramma in that size tank. For the other fish, I’d also generally stick to one per species, as they are known to fight. I’d also look into the areas of the tank each occupy and not get too many per area (sand, rock, open water).

As @Sharkbait19 said well...

 

[HawkeyeDJ]

Red firefish are good, however I made a mistake and placed three of them together. They seemed to get along fine when they were the only fish in the tank. Once I added other species, two of them decided to bully the third and they made his life miserable. Might just be a coincidence. Maybe the two were becoming a pair. I don't know. After a few months, I'd had enough and returned the bullies to the LFS. Now the third is healthy happy and active. I think he realizes what I did for him and appreciates it.

 

[CrimsonTide]

Can I have more then one? Do they get along?

They do not get along. So no. But still a cool fish. Mine isn't a bully but the rest of my fish are kinda clueless.

 

[Cwgrl_Ldy]

I love my green clown goby. But he's very shy. Super cool tho

 

[reeftankdude]

Which Chromis fish can live in a small group with this size tank? I read that PJ Cardinals do best in groups. Is this correct? thanks all

 

[STEEZY]

Possum wrasse is my favorite fish in my 20. Also really enjoy my tail spot blenny. Other tankmates are a clown and a purple Firefish that are cool.