Guppies Ok?

[deanT]

hiya guys for the last few days all of my guppies are stayin in one area of the tank close to the corner at the top of the water they dont swam down bottom of the tank anymore. could anything be wrong?

Tank is a 30l no other fish just 4 guppies

Thanks

 

[Harlequins]

Is your tank cycled? do they appear to be gasping?

 

[Denil]

maybe something is catching their atention at the top orner of your aquarium.....do you have something near the aquarium?

 

[OldMan47]

Harlequin has given a good question to get to the answer of what is going on Dean.

What do you have for chemistry parameters and what are your maintenance routines?
How long has you tank been set up and how long have the fish been in it?
What are you using for filtration?
How well is the water circulated to become oxygenated?

These are a bit more specific but go to the same concern that Harlequin was trying to ask about.