Five Star Chemicals has been producing cleansers for commercial breweries for some time, and has now packaged their cleaning technology into home brewing sized packages. Their approach is twofold; the brewer first uses Powdered Brewery Cleaner to remove deposits from equipment, and then uses Star San, a professional grade soaking sanitizer, to sanitize the cleaned equipment. When diluted as instructed, Star San does not require rinsing, and will not stain. Both PBW and Star San are safe for limited contact use with stainless steel, plastic, copper, brass, and ceramics, and are safe for septic systems.
This one pint bottle of Star San will make up to 80 gallons of dilute working solution that does not need to be rinsed after use. Use by itself, or in conjunction with PBW powdered brewery cleaner (to remove deposits before the final rinse).
RESTRICTED SHIPPING: Ground shipment only to lower 48 states. No air shipment, and no shipments via Postal Service (no shipments to Zone C).


Best sanitizer I've found
Pros: This is the pro stuff. It's simple to measure, doesn't stain like Iodophor, and the residue/foam is food grade safe. I make up 5 gallons for every brewday.
Cons: The foam can be annoying in carboys and bottles, and lasts for awhile. I use Saniclean for foamless sanitizing.
Fantastic - no rinse - no worrys
Pros: Does a great job of sanitization. Easy to use, safe , and cheap when you look at how little it takes to make a solution.
Cons: Foam can take a little time to dry. Allow for this in your planning.
Suds
Does a good job and is twice as concentrated as BTF Iodophor, but as the other reviewers have noted it foams up a lot!
foaming Star San
I've been using this for a year or two. Yes it does foam. I siphon from tank to tank and this eliminates a lot of it. Excellent product!
Highly recommend
This sanitizer is great. No rinsing is needed. You don't even need to worry about the foam left in the container but I usually rinse most of it out. I've never had an infection when using this product.