[tang daddy]

You can safely raise 100ppm of mg daily, for your size system it could mean lots. I had to raise mine over 400 ppm and it took me 2 weeks and tons of mg.

You could build a make shift drip system out of an old milk jug or anything that holds water, then calculate how much mg is needed to your total water in your system, and using gravity syphon with a irrigation nossel drip it in over a week.

Eg. 2 cups of mg to 1g of ro, drip it at 1 drop per second. Test it after you have finished adding the mg and see where it's at then you can mix up another batch.

Surprisingly most people don't have to dose it, I am dosing 180 ml for my 90g of water volume daily. That's alot considering of small water volume... I couldn't keep up and had to get a doser.