How big should my cage for my parakeets be?

I have 2 new parakeets! I don't know much about them, but my sister says that the cage should be bigger. We know that we should get a bigger size cage, but there are so many sizes that we don't know which one that we can choose! Help!

What is the best light to put on my rainbow boa so his iridescence shines the brightest?

So I want my Brazilian Rainbow Boa to SHINE! Does anyone have any special bulbs to recommend just for viewing purposes? Thanks!

What docks to buy for red ear slider turtles for my 55g?

I have a 55g tank with some fish, just bought two baby red ear slider turtles today (male and female I think) but what docks should I buy for long term for these little guys? Theres a 5lb floating turtle log on amazon that seems pretty good, and how should I feed them once they are in the tank? would they be able to find the turtle pellets or would my goldfish eat them? thanks for any tips!

How to breed leopard geckos and how to raise the babies?

I have a 5 year old female leopard gecko named Casey. A friend of mine may be getting a leopard gecko soon and she wants a male. We're thinking about breeding them once her male is old enough. Any information on breeding/raising leopard geckos would be wonderful.

What is the best kind of hamster to get?

I am going to have a hamster soon and i wanted to know which hamster is the most friendliest and easier to be tamed. In my local pet shelter there are many different varieties of hamsters and i wonder which breed to get. I'm not planning to get a robovski hamster because i already have one. Please tell me the sizes too, i'm not planning the get a dwarf hamster.