Good job on getting the pH down. If you are going to go get a test kit, and you have a Leslie's in your area, you might want to look for their High Range Cl test kit. It's a DPD-FAS test that will test up to 50 ppm Cl. It's considerably more accurate than the OTO test, as it will show you within 0.5 ppm where you are at. This will enable you to maintain the Cl level at 15 until the water clears (which is what you should be doing this afternoon, btw )

Let us know what happens with the CYA. Aim to keep your pH in the 7.5 range or so for now. We'll decide what to do once we find out the CYA level.

Michael