Hey bro, personally i like Hygetropin but if you want to stick to one of the colored tops, I believe they will all be someone similar. I have not used them but usually the more expensive the version, the more purity you will get. Hard to say if you will notice the difference in something that is a little more or a little less pure. But if you wanted to be safe, you could opt for the ones that are a little more expensive. Your call though. With bacteriostatic water, I usually add 1ml water to each 10iu vail. then 1/10th of a ml equals 1iu. You can pick up bac water up all over the net. Even eBay has it. If you cant find it, drop me an email through the Next Level Nutrition page here at Naps and I can direct you to a place, but really its all over, even Ebay. Naps carries some good generic gh and at your age, you will get a good effect from it. Just a thought, if you have not had your test levels checked, you should get them looked at. You may qualify for TRT. If your test is low, then you get on test replacement along with your gh cycle, you will be feeling like a million bucks!