Hi Pamela
Fiona and Simon replied while I was typing so apologies if I repeat some of what they say.
Using media and decor from another tank is the quick way to cycle a tank but it doesn't usually negate cycling. The simplest thing is to move some media and decor (not so much that the pictus is left without enough) and then follow the fishless cycle method. The slow bit with any type of cycling is getting the bacteria colonies started from the very few in the water supply so adding some bacteria on the old media and decor significantly shortens the duration of the cycle.
Sources of ammonia - Homebase (if there is one left near you!) in the household cleaning section, or on-line. Ebay and Amazon sell ammonia suitable for cycling. Some sellers sell ammonia specifically for cycling, or Jeyes Kleen Off Household Ammonia is fine - I've used that brand,
As for spring water, that will contain some minerals but not chlorine/chloramine. Because of this, you may find that even a cycle with no added bacteria (media, decor etc) would go faster than usual as there is nothing to poison the naturally occurring bacteria we want to grow. But you may still need to add a dechlorinator because of any metals that might naturally be in your spring water. I would suggest you use something like API Tap Water Conditioner which contains only a dechlorinator and something to remove metals - nothing to detoxify ammonia (needed by people with chloramine added to their tapwater) and nothing to 'promote the slime coat' (which isn't necessary). That dechlorinator is the one I use, the downside being that not many shops stock it so I have to get it on-line.
You do need a test kit if you don't already have one. On-line is cheaper than 'real' shops but slower as you have to wait for the post.
And it would also be worth finding the hardness of your water as you won't have a water supply company to check with their website. Do you ever have water quality tests done on your water? If you do, the hardness should be in there. If you don't, you can buy a test kit for hardness but it would be cheaper to get your water tested at a shop - hardness in tapwater doesn't change. Ask them to test GH and KH and to write down not only the numbers but the units as well. Shops are notorious for saying things like 'fine' or 'OK' which are meaningless with hardness which is why you need the actual numbers and there are half a dozen different hardness units so you need to know which one your numbers are in.
The GH level affects the types of fish suitable for your tank, more than pH. And the KH level can affect the cycle - the bacteria we want grow slower in low KH.