10 Gallon Tank Guppy sick, staying in one place

I have a 10gallon new cycled tank and I keep 2guppy in it, first 2days they look so active then today they look sick they are staying in one place, can u guys tell me what happens?
Temp=80F,Ph=7.2,ammonia=0,nitrite=0,nitrate=10

 

describe what they are doing that makes you feel they are sick. are they just sitting still at the top?

 

They are both sitting in the bottom one place still and not moving and something staying on the top and gasping

 

They are both sitting in the bottom one place still and not moving and something staying on the top and gasping

do they have an airstone, or a waterfall from an HOB? it could be they don't have a lot of oxygen. how long have you had them? quarantining them would be a good idea. can I get a picture?

 

Look one is on the top and one is on the bottom

do they have an airstone, or a waterfall from an HOB? it could be they don't have a lot of oxygen. how long have you had them? quarantining them would be a good idea. can I get a picture?

I didn't quarantine them this is my first fish, I bought it two days ago and yeah there is a waterfall from hob

 

they are very pretty, what kind are they?

when in doubt, add some hardness to the water. guppys love hard water, meaning there is lots of calcium and minerals in the water. if you are not sure if your water is optimal, you can always add a wondershell, those turtle calcium block things, or anything that can supply a little calcium. if they came from a big box store, or really any fish store, they could be in distress. do they eat?

 

Albino's red guppy is dead, now I have cobra guppy and his staying in the bottom of the tank looks like he's going to die.IDK what to do I did a water change and checked the water everything looks fine, the one is dead I see red gills and some red spot under her belly and I see ammonia is 0 nitrite 0 nitrate 10