I mad primo enan at 250mg/ml with 2/20

Can you tell the steps/procedures you went through? I have just crashed my 2nd batch of 100mg primo @ 2/15. Looks like cottonballs on the bottom. Don't understand as to why I cannot get this to hold. 200mg primo holds at 2/20, so should 2/15 be enough for 100mg? Maybe missing a step? Take a look someone if you don't mind...

http://www.steroidsuperboard.com/bo...showtopic=21073