Are my guppies sick?

[Daniel_123]

Hi there, i've had my guppies for a couple of days now and they are always at the top of the tank in one place. Any ideas?

Many thanks Daniel

[heeroyu16]

Hmm, is your tank well oxygenated?(Plants or other elements)
If not add a air pump.

[manatwork]

Ya they still be lack of oxygen ba or if u dun want to get any pump.... remember to change ur water more often like 3 to 4 days...

But from my point of view is that.... Buy a reasonable cheap 1 and can save some water bill as maybe just need to change water once a week

[manatwork]

or izzit due to over crowded.... cos guppies can live with minimum amount of oxygen

[exotic_idiot]

How many you kept in the tank and how big? Any dead fishes lying around which you didn't catch out may pollute the water..