I know. But it's a copied text on the internet from commercial aquarium books. But it's really longer. 6 Months storage is a total incorrect information. Like more information that is incorrect about livebearers is spread over the internet by copied texts from commercial books. And once people just copy that text multiple times, people tend to believe that that's the correct info.
Serious breeders (in this case guppy breeders) know that the sperm storage is over a year. And that's why serious breeders won't ever use females that have mated before with a different kind of male(s), that have mated within a year to reuse for another project. If they're out of sperm packets, we call such females, clean females.
And a lot of people just don't know that sperm storage only goes for most (so, not all...) ovoviviparous livebearers. Real livebearer fish (viviparous), the females don't have the ability to store sperm packets. So, the remark that I also do read that often is that people tend to tell that all female livebearers are able to store sperm packets, just ain't true. You just need to know which livebearer species it may concern.
Another example: And do all livebearers have a high reproduction potential? The answer will be: No! People tend to keep a reference to the wellknown commercial livebearers. There are a lot of livebearers that have a low reproduction rate with small batches of fry even. And also a number of them have a much longer gestation period.
Most people (goes also for this forum... no offense, btw...) are not familiair with the whole of the livebearer world. It's also one of the reasons why I've started my website about livebearers. To show people that the livebearer scene is much bigger than most people think.
Do all livebearers need hard water? The answer will be: No again! It really comes down to the species itself. And I do write articles about livebearers that have been published in serious magazines. In those articles you will read different things than most people at an average forum will tell you about livebearers.