I just added so many drops per gal. Then did a test to see how much that was. My ammonia was a 10% mix and 12 drops a gallon worked out 1 ppm if I recall properly. But it does not matter, get a dropper that lets you put it in by the ML and you can make short work of it. Just find out how much it takes and write it down. Then add what is needed to bring it to 4 PPM. It will go awhile, but you will test it one day and it will be 2 PPM, and then you can add half what you added the first time - Wham Bam you are at 4 PPM again...
On Mon, Apr 20, 2009 at 4:24 PM, Ed from AZ <[email protected]> wrote: > >> and add enough ammonia once to bring it to 5ppm. > > Having a bit of trouble envisioning the math formula for this to get > an amount. > > Five parts ammonia for each million parts water, yes? > 20 gal / 1,000,000 = .000002 gal = .0075 ml > .0075 x 5 = .0375 ml ??? > > Do they make droppers that small? =8>O > Or am I a bit off in my formula? > > Ed
