juvenile guppies keep dying

[Cmlee]

I have about 15 juveniles. 1 started to die a day , becoming more deaths like 2 a day and the rests are mostly swimming at water surface.
Adults looks still active and rare death with fry too.
Anyone know what is wrong?

[ymk87]

Hi there,
Is your tank cycled? How long has your tank been set up? Is your filtration able to handle that much bioload from all the fishes?

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[Guppendler]

There can be a number of reasons with no further information or pictures we cannot really determined. If you really want to keep the fry, they should not be kept with the adults