A 20-gallon tank can comfortably house around 6-8 white cloud minnows.
Only if they are white cloud minnows.
Yes, almost all shops sell guppies and nearly all of them sell white cloud minnows.
Yes they are. Plenty of websites will give advice.
Any well balanced flake food for tropical fish will do.
2 twice a day for each of them.
Harlequin Rasboras White Cloud Minnows Zebra Danios Guppies Mollies Platies Swordtails Corydoras
No, they actually lay eggs. The eggs are laid in a patch of slime that might stick to some plants or to a rock. They hatch out in two or three days. White Cloud Minnows will occasionally eat their young, but not always, especially if they have other food. It might be worth separating the young till they grow a bit.
If by minnow you mean the "white cloud mountain minnow" (Tanychthys albonubes) then they are old at around 2-3years.
She can buy some little fish that will eat the mosquito larvae. I have White Cloud Mountain minnows.
Some types of fish that can live peacefully with minnows include danios, guppies, neon tetras, and white cloud mountain fish. It's important to choose fish that are similar in size and temperament to minnows to prevent any aggressive behavior or conflicts in the aquarium. Always research the specific needs and compatibility of different fish species before adding them to a tank with minnows.
betas, white cloud minnows, small cleaning shrimp, maybe even a goldfish for a few weeks before it out grows the bowl.
No, but some tank mates you can consider if your betta is in a 10 gallon tank are neon tetras, rasboras, white cloud minnows, or even some ghost shrimp.