whats wrong worryine behaviour

[wongy008]

hey guys was just sitting here looking at my fish
feed em as usual but noticed their appetite aint like their usual
also two guppies were just lying on the gravel while ive never seen before like there out of energy or on there last breath

shall i be worried

 

[billy61788]

how long has your tank been setup?

 

[wongy008]

quite some time now

would say over a month