Honestly, I put it in, and the next day, it already felt a lot better. I remember after about a week, I really could feel, and even see the difference. It was all maintenance after that.
Now, after almost a year, I don't see how a single hair on his tail could ever break again.
When it was liquid in the summer, I got one of the hair dye applicator things (one of these things-Sally - Sally Slant Tip Color Applicator Bottle
) and poured it in there. I used that thing, since the nozzle is so small, it's easier to pour the right amount. I would pour some in my palm, about enough to fill it without dripping out, then starting at the base, and work it in from top to bottom.
In the winter when I don't use the olive oil, I'll heat it up enough to where it's like a paste, and just dig out a small amount, and warm it up with my hands to liquify it, then do the same. Or, you could just keep it inside at room temperature, and not go through all of that.
If your horse has a lot of tail, then use as much as you need. But, that amount is about right for my geldings tail.
I use it about 4-5 times a week, as that's how often I'm out at the barn (I keep him on my grandparents land about 15 minutes away).
I definitely suggest trying it. It's done a great job for me, as well as several other people.