How Many Fish in a Tank?

[Lionfish718]

I have a 40 Gal tank and I would like to add 1 more fish making it 7 fish in the tank. Does anyone think that is too much?

 

[fcamargo6thave]

it all depends on what type of fish you have. what do you have already??

 

[lfsmarineguy]

it depends on what the other 6 fish are. If we're talking about clown gobies than no, post your stock list.

 

[Lionfish718]

2 clowns, 1 yellow tail Damsel, 1 Hippo Tang, 1 six line wrasse, 1 sand sifter goby.
I want to add a Cardinal Fish.

 

[ZANYMASTER]

How big is the Hippo?

 

[Lionfish718]

Hippo is small about 1 inch

 

[ZANYMASTER]

You know we have the Tang police here but no worries,it's still small:tongue1:.Those six lines are nasty so no more wrasses.

 

[Lionfish718]

hahaha I know all about the tang and wrasses. But no one is answering my question.

 

[bizarrecorals]

if your water perimeter is good, adding another fish is fine, no one here will ever know the aggression of your personal fish, is hard to judge if one will kill another.

 

[ZANYMASTER]

True.

 

[yiliyang]

Cardinal fish are very laid back, I have only seen them acting aggressively toward their own kind, even that is only none physical posturing. They also do not seem to generate a lot of waste.

I think you can safely add the cardinal. That hippo will easily double it's size by July and generate more waste than all your other fish combined. You may have to get bigger tank or trade the hippo.

I say go for the cardinal.

 

[fcamargo6thave]

i also think you are ok to add the cardinal the tang may get too big but until then you are fine, just watch out for stress on the tang the are very prone to get ich.

 

[basiab]

Which cardinal. They are very timid and it may depend on what your current stock feels about the new addition. Here is what I have in a 24 gallon.
Spotted cardinal (6 years), neon goby (3 years), Firefish (2 years), green clown goby (new 4 weeks) to replace my 6 year old that died. I did get rid of my royal gramma after 2 years because I wanted to add more fish and he was getting too bossy.
Now I just added:
a pair of rusty gobies (about half inch each).
Another neon goby.
And a Blue chromis.
It does not look crowded and they seem ok except for the neons since they are not a pair.

 

[Lionfish718]

ok cool I am going to get it. I guess by the summer my tang will be up for sale

 

[cmor1701d]

No one can tell you for sure. It depends on water quality, total water volume, size of current fish (and plans for those that get big), total current bioload, filtration, amount of Live Rock or other hiding/grazing places, feeding and maintenance practices, etc.
So go for it if you must, but be watchfull.

 

[Awibrandy]

No one can tell you for sure. It depends on water quality, total water volume, size of current fish (and plans for those that get big), total current bioload, filtration, amount of Live Rock or other hiding/grazing places, feeding and maintenance practices, etc.
So go for it if you must, but be watchfull.

Agree!!!!​

As well as the aggression of your current fish! They may, or may not allow you to add another fish never mind a timid one.
BTW, it is not only Ich that the hippo is prone to. They are also prone to lateral line decease. Feed him well, and keep his home nice & clean until he gets to big for your 40b.​