I had I.P . deca 300 ,and there sust 300 . I did'nt notice anything like you mention in them , But on a side note I stuck one of 100ml sust 300 tubes in my freezer for a couple days ,And not a single crytal came out of suspension . I did this because I was'nt getting a damn thin off of 1200 deca and 1200 sust . And I had name brand oganon sust in my fridge ,and it was coming out of suspension ,and this sust 300 was'nt even coming out in the freezer ,and it's a higher concentration per ML . When it comes to gear I onlty trust a very few U.G. sources the 2 being HF labs ,And U.S. Gear other than those two I'll stick with human grade , But some swaer by I.P. so maybe it was a case of a bad remailer in my case .