How much propylene and how much water for solution?

Getting this solution right is obviously massively important.  I've been tapering using a mixture of 10 ml water and 1 mg klon. 

 

Now I have propolylene glycol which is supposedly better to create a good solution but should I mix it with water? If so, what is the best ratio for making a solution with propylene and water?  50%/50% OR?

When I was using water I was making a new batch every day which resulted in a lot of waste and trouble.  If you use propylene in your solution can you keep it for days, weeks, etc.?  Does refrigeration make any difference?

The ratios are the same as with vodka...2ml of solvent for each 1mg of benzo.  If you use a ratio of 1mg benzo + 2ml solvent + 8ml water, you have a finished solution of .1mg per ml.  Very easy to calculate cuts and doses, no math, just move the decimal.

 

And that's a ratio.  Use that ratio to make larger batches, like 10-14 day supply.

 

Yes, it can be safely stored in a covered glass container at room temp.

Thanks.  That is what I saw elsewhere but wanted to at least find someone to confirm.  Thanks for your help, Builder!