Like what absolutaly needs to be in the aquarium, and is it ook if i get guppies from Walmart, will they still be hardy, when I get them should I float the bag in the aquarium,what do you think is the best feature about fancy guppies? Tell me every thing you know, and do you need aquarium salt for them?

before you do or buy anything, do some reading.
this is an excellent book for beginners (availible at Barnes & Noble and PetSmart):

http://www.buy.com/retail/product.asp?sku=30841388&listingid=12629407&dcaid=17902

here are a few starter tips-

tank:
guppies need a minimum of ten gallons, but you can squeeze them into a sightly smaller tank if you have a good filter and you are religious about your water changes (50% weekly is best, and more often than that for tanks under 10 gal. never change 100% or your biofilter will crash). the ‘one in inch to a gallon’ rule applies to guppies like all other small tropical fish.

filter:
you will need a filter that will filter at least 10x your aquarium content an hour. that’s 100gph (gallons per hour) for a ten gallon tank. more filtration is always better. along as the filter doesn’t create a overly strong current, you can’t over-filter your tank.

stocking:
it’s a good idea to get only male guppies or your tank will become overrun very quickly. also start with just a few fish (two or three) to cycle the aquarium. even after your cycling is finished stock them slowly so the bacteria can catch up.

cycling:
cycling is a essential, but often overlooked part of having a new aquarium. cycling is building a ‘biofilter’ or a colony of good bacteria that will remove ammonia from your tank.
read about cycling here:

http://freshaquarium.about.com/cs/biologicalcycle/a/nitrogencycle.htm

source:
you probably shouldn’t get them at Walmart, Walmart doesn’t provide very good care for their fish so they are likely to die as soon as you get them home. i recommend PetSmart as all their fish are breed a a privet parasite free facility. they also have a fourteen day guarantee so if they do die you can get your money back or new ones for free.

floating:
yes, float the bag. that’s the easiest way to acclimate them to the temperature of the aquarium. there are other methods like the ‘drip’ method that will also acclimate them to other water conditions. but that is more trouble than it’s worth and only needed for very delicate fish (which guppies are not).

yay guppies:
the best feature of fancy guppies is they have a big impact with their bright colors and long fins for such hardy little fish. but remember ‘hardy’ does not mean ‘indestructible’. and in bad conditions, even if the survive they will lose all that beautiful color.

heat:
guppies need heating(if you are getting a kit it will likely come with a heater). Marineland has probably the best, most reliable heater for a reasonable price: http://www.petsmart.com/product/index.jsp?productId=2754055
for a 10 gal the 50 watt Marineland heater is best, for a ‘nano’ tank (anything under 10gal) you may want to try a ‘mini’ heater, but most good heaters will shut off if the aquarium heats too fast. avoid PetSmart’s ‘top fin’ heaters, they break easy and can cook your fish. (most other top fin products are fine as they are made by many different companies for PetSmart.)

salt:
guppies live in freshwater not saltwater, but small amounts of freshwater aquarium salt can be beneficial. it’s also best to keep a little aquarium salt on hand for treating sick fish with salt dips.

please contact me if you need any further information.