Myy Platies Are Acting Weird

[4064123]

my 2 platies are laying near the bottom ive seen them do tyhis before is this normal
 

 

[BerryAttack]

check your water stats... has your tank been cycled?
what other fish you got in there?
what size is your tank?
how long have you had your tank up for?
add a bubblier to add more oxygen... and do a water change for now.
you over feeding?

 

[4064123]

yes 30 gallons betta tetras dwarf gourami and guppies begining of january have bubble bar did water change no

 

[BerryAttack]

i would say get your water tested... 
are the fish showing any signs of stress? intense breathing. do they look skinny? have any unnormal marks on the body or fins? 

 

[the_lock_man]

My initial instinct is that that one or both of them are female and are about to give birth. If one is male, he is hanging around for a free snack.
 
Equally, it could be a water quality issue, although I would say it's not lack of oxygen, as you would expect the fish to be gaping at the surface. A bubbler won't make a huge difference to the dissolved oxygen levels in the tank, other than by increasing surface agitation (rippling), which you can also do by adjusting the filter outlet.
 
How did you cycle the tank and what are your current ammonia and nitrite readings?
 
By the way, you will probably experience problems with the betta and dwarf gourami at some point - they view each other as threats. Also the betta may take a dislike to the guppies - some do and some don't. You need to keep a close eye on the tank.