Green Barb Unwell

[Queen oF The Gravel]

I am currently keeping 3 tiger barbs and one green barb in a 30litre tank (temp 27c) we had two green barbs but one recently died and dissapeared, now the remaining green barb has gone a dark colour and also has developed a thiner shaped body. He looks very unwell, spending most of his time at the bottom of the tank strugeling to get to the top to feed. He often turns upside down and appears to stop breathing for a second or two then turns back around and carries on.

The green barb we had with this one showed simular symptoms before he died. Can any one help us?

Thankyou for reading.

 

[maya]

I am currently keeping 3 tiger barbs and one green barb in a 30litre tank (temp 27c) we had two green barbs but one recently died and dissapeared, now the remaining green barb has gone a dark colour and also has developed a thiner shaped body. He looks very unwell, spending most of his time at the bottom of the tank strugeling to get to the top to feed. He often turns upside down and appears to stop breathing for a second or two then turns back around and carries on.

The green barb we had with this one showed simular symptoms before he died. Can any one help us?

Thankyou for reading.

Sorry to hear about him--

Are all your parameters normal? How is his poo? Is it white or stringy? Do his gills look red or enflamed? Does he have any bumps or lesions?

 

[stang1]

As Maya said, you need to check your water stats to see if that is part of the problem.
The other problem is the tank is too small for Tiger Barbs. They prefer to be in groups of 6+, can be very nippy and like plenty of swimming space.
Do you know what your readings are for ammonia, nitrite, nitrate and PH?