You can go ahead and drizzle in some bleach as the pool is filling and stir the water around with a clean broom or whatever. If you don't already have one, try and pick up an OTO/Phenol Red kit (yellow and red drops) so you can use that while waiting for your K-2006 to arrive. (And, actually, even after you have the good kit, you can still use the OTO for quick daily checks. That is what I do.) Use the OTO to test the pH of your fill water.