Guest5431
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Post pictures of them.
How big are they now?
How often do you feed them and what are you feeding them?
How often are you doing water changes and how much do you change?
If they are fed well, given lots of water changes and have warm water, you should be able to sex them at 2-3 months of age, usually 2. With the cooler water you have it's probably 3 months before they can be sexed. They should be an inch in length (body size not including tail) at 3 months.
The tail doesn't get full size or full colour until some months later and it might be 6 months before they have a full sized colourful tail. You should have some colour in the tail at 3 months though.
How big are they now?
How often do you feed them and what are you feeding them?
How often are you doing water changes and how much do you change?
If they are fed well, given lots of water changes and have warm water, you should be able to sex them at 2-3 months of age, usually 2. With the cooler water you have it's probably 3 months before they can be sexed. They should be an inch in length (body size not including tail) at 3 months.
The tail doesn't get full size or full colour until some months later and it might be 6 months before they have a full sized colourful tail. You should have some colour in the tail at 3 months though.
I don't know with the varieties you have, but I have had wild type guppies take up the 5 months before they suddenly transformed.
Just wait for @emeraldking to see the thread and we will get a more positive time frame. 
Hi,
A batch of newborns can be of one sex for sure. So, that's not something weird. A female won't change into a male by turning up the temperature. If you do breed guppies and you want more males in the sex ratio of newborns, you can raise the temperature during the whole pregnancy. And not just halfway, at the end or even after. If you breed them at lower temperatures, more females will be born. It's not that it always works but it's got to do with a sudden increase or decrease that is used during the whole pregnancy. For if you're keeping the temperature steady at higher or lower rates, the sex ratio should be about 50/50 - 60/40 - 40/60.
The determination of the sex itself should already be possible after a couple of days. But it needs a trained eye to be able to do this at an early age. Like most serious guppy breeders, also I do it that way.
Showing color, pattern or even further development of the fins needs time. And that time differs per individual specimen. It depends on genetics, water parameters, food and temperature. Even the water flow can be of influence.
A batch of newborns can be of one sex for sure. So, that's not something weird. A female won't change into a male by turning up the temperature. If you do breed guppies and you want more males in the sex ratio of newborns, you can raise the temperature during the whole pregnancy. And not just halfway, at the end or even after. If you breed them at lower temperatures, more females will be born. It's not that it always works but it's got to do with a sudden increase or decrease that is used during the whole pregnancy. For if you're keeping the temperature steady at higher or lower rates, the sex ratio should be about 50/50 - 60/40 - 40/60.
The determination of the sex itself should already be possible after a couple of days. But it needs a trained eye to be able to do this at an early age. Like most serious guppy breeders, also I do it that way.
Showing color, pattern or even further development of the fins needs time. And that time differs per individual specimen. It depends on genetics, water parameters, food and temperature. Even the water flow can be of influence.
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