I bought some grains at lowes that are made of sulphur. Claims it is safe for pets and wildlife so that is why I chose it. There was another kind there but had a different ingredient in it, started with an "M" I think ?
Will the stuff I bought work? We have a horrible infestation of slugs and all the rain we've had has really boosted them. No, sadly, I guess they don't drown

Are your beds clean?
Dead leaves and mulch creates a home for slugs.

They are mulched with cedar. I just mulched them last fall. Other than that, clean. I pick up any dead leaves. This property sat empty for several years before we bought it and the yard was uncared for for a very long time. So we have an abundance of critters. I don't like to use chemicals if it isn't really needed. Trying to find a way to kill the slugs that won't harm my earthworms.

Try removing the mulch at least one foot away from the base on the plants.

Pulling the mulch back may help with the slugs, I don't know, what I do know is that bare soil invites weeds. So I try to keep my soil mulch as much as possilble. Any bare spot in my garden is almost immediately infested with weeds, I try to keep everything mulched. I am still using diluted ammonia to spray my hostas and daylilies with, they are not 100 per cent slug and snail free, but compared to last year I am way ahead and we have had lots of rain this year so far. I still feel slug and snail bait attracts the very things your are trying to repel, its like attracting deer to your yard and then trying to use a spray to repel them (that is just my personal opinion).

so does sulfur attract slugs or just kill ones that are already there?

From what I can read, and check the package your bought, the sulphur (sulfur) based pellets are about 1per cent sulfur and that leaves 99 percent other. The best I can tell there are attractants in that other 99 per cent. But it does seem to vary by product.

http://www.lowes.com/pd_55005-...

This is what I bought

What I am seeing mostly are tiny slugs about 1/3 of an inch or so. Maybe some even smaller.
So the amonia, will it kill earthworms?

Being the solution is a contact type of spray, it will be very unlikely than many if any earthworms would be affected by it. It does kill the slugs and snails on contact (they melt away) and (I think it acts as a deterrent and not an attractant). I have lots of earthworms and I have never noticed any dead ones after spraying.
I would certainly try the product you bought and see how it works, all the reviews I read on it seemed positive.
Then post back what you think of it.

Ok,
also I was just out there and noticed that I have a billion kajillion rolly polly bugs. I have always thought of those as harmless, are they?
I don't see them ON the plants, just all around them on the ground area.

I have always thought of them as bugs that ate decaying matter, but I have suspicions that some of the damage I see that looks like snail or slug damage is actually from "roly poly" pill bugs. I really don't know!

the 1/3 inch long slugs are the "newborns". just hatched this spring. we have an overabundance of them here in Seattle this year as well, TO SAY THE LEAST! due to our record warm winter/spring. oddly, we have found the babies are responsible for the majority of the damage to our hostas, rather than the larger ones. we've tried everything from dry coffee grounds to chemical powders, from copper tape and wire to flame throwers. they seem to be backing off now that some dry, warmer weather is here. but I know as soon as the next batch of rain hits, they'll be back in droves...

Frillylily
I don't know if you thought the product you bought would kill the pill bugs, but it is the Bug-getta plus, that kills snails and slugs and "other things". The product you bought should not harm the pill bugs.

well I didn't want to harm them. Until I just realized today there are SO many of them. That made me wonder if they really are harmless or if they are harming my plants. The new growth, is what is most affected.