I'm switching my betta to a new 8 gallon tank and i was wondering if i could cycle it using old water, rocks and a snail? I here there cycle resistant. I'm hoping to use a nerite snail because i dont want a whole bunch of them. Also if its possible....how?

I used snails to cycle my 10 gallon.

I wouldn't say they are cycle resistant (meaning they won't die), but they generally do live through a lot. My cycle took about 4 - 5 weeks with some pond snails (that reproduced) and a mystery snail added about 4 weeks in.

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not necessary and planting the new 8g would prevent ammonia and nitrIte spikes anyway.

Just be sure to not add food for a week or so.

my .02

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fw leiden since 1979, fo salt since 1979, mixed reef 55g 2002-2009. Strong emphasis on the tank taking care of itself. Balanced with plant life, no water changes, tap water, no filters in FW. Only dosing calcium, alk, mag in marine reef tanks. http://www.aquariumforum.com/f15/my-...ods-26410.html
recent tanks (till 2009) 7 years- 10g FW leiden 7 yrs, 55g mixed reef 7, 2 yrs, 20g FW leiden, 10 g fw leiden , 29g mixed reef, current tank 55g leiden

I put a gold incan in my 10g with some danios while it was cycling and he's still in there happy as ever so I guess it'd be ok

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10g- 2 hi-fin fm platys, 3 koi & red wag sword fry
40g Breeder- 6 danios, 4 female swords, 1 male swords
"I was born with nothin and I still got most of it left."- Seasick Steve

It shouldn't be a problem. Make sure you have some plants in the tank. Snails like to feed on the algae that grows on the surface of plants. You might add a bottom feeder tablet every other day.

I wouldn't count on a nerite snail surviving a cycle, they can be sensitive. If you use some old substrate or old filter media the cycle should be very rapid though.