If you have an oto test that measures up to 5, you can use one part pool water to one part steam distilled water, mix well, test a sample from that, read your results, and multiply by 2. Or if you need to go higher, mix it 1:2 and multiply by 3. You lose a little accuracy with each dilution, but it'lll give you a ballpark until Ben's kit comes in.
Janet
Bookmarks