I am introducing Peach syrup in the secondary for a 5 Gallon batch of Pale Ale. Problem is, I can't seem to find out how much I should use. Here's what I'm using: http://www.davincigourmet.com/products/product_details/?productID=89 Anyone have a suggestion for how much to use?
Take a small sample from your fermenter. Add the syrup drop by drop until you get the right taste you want. Scale that up to 5 gallons
Gatorbeer's advice above is good (assuming it will take a significant amount of syrup to get the flavor you want), but keep in mind that any sugar in that syrup is going to ferment into alcohol, so it's not going to taste as sweet as the sample you calibrated to. If you're not particularly interested in increasing the ABV, you might consider using a sugar free syrup (assuming it has the flavor you want), so your sample taste will be more accurate.
Just a little sweetness should be okay. I'm surprised I haven't found much for using a syrup. Plenty of suggestions out there for puree, whole and extracts. I was also thinking of adding 1 oz of peach extract the full batch to fill in where the syrup potentially lacked. Thoughts?. I might experiment as Gator suggests. I'll let you all know how it goes. What's a good way to blend in?
I'd be most concerned with what's in that bottle. Any preservatives or additives? Sometimes those can have a huge impact on your beer in a detrimental way. Humor me and read the back of the bottle. It's easy to trust the words "all natural" but when the term "natural flavors" include MSG, I'd still be leery.
This. I could see this being a good idea for a peach beer. Some fruit has a powerful enough flavor on its own, but I would imagine peach to definitely be on the more subtle side of things. I brew a raspberry wheat beer for my sister, and that's a raspberry bomb just from a 3lb can of puree. I recently brewed the same beer adding the same amount of blueberry puree, and it contributed a much more soft/subtle flavor and aroma. If I were to brew the blueberry beer again, I'd definitely look into adding some extract at bottling.