Guppies normal swimming behaviour

[mishyc]

I bought 4 male guppies today to go in my 64l tank with my neon tetras. They have been in there now for about 5 hours maybe more, and are staying at the top mainly! My question is, what is normal guppy behaviour and will they come down when more settled? I checked my tank parameters two days ago and they were, ammonia 0.50, nitrate and nitrite 0, I have done two 10l water changes in two days

 

[nooboftanks]

Things check out ok considering your ammonia should have gone down after those water changes how many neon tetras do you have in there that could be a reason they are staying at top if there's not much room for swimming towards the middle but it's not unusual to see strange behavior when fish are first moved into a new aquarium so give it a few days to let them become acquainted to there new environment

 

[mishyc]

10 neons, the neons aren't bothering them much, just go up now and again to look at the guppies

 

[mishyc]

Seems my black guppy is now going yellow, is this normal?

 

[mishyc]

this morning

 

[mishyc]

last night

 

[nooboftanks]

I'm not a guppy expert and personally haven't kept them but a fish changing colors overnight is never a good thing this could be because of extreme stress are you sure all tank parameters are ok because Guppys aren't the most sensitive fish and it takes a lot for this sort of a change to occur

 

[mishyc]

Will check them tomorrow, I've done a 10l water change today. In the store he looked black, but the whole tank had a blue light! In the pick where I got him home he does have a hint of yellow. He will have been stressed on the journey home so maybe the latest pic is of his true colours which I think is dark blue and yellow! The other guppies have brightened up too! They all fed today and are all swimming and sticking with each other. I will keep a close eye on them all until I know what's normal or not