Can you refresh my memory on where to find out how much borax and stuff I need to add to change my chemicals. I have the bleach calc, but I don't know how much borax to put in to change ph. Any advice or tips are apprecitated. Right now we are getting a thunder storm and I can't go out. I also am waiting for my dh to hook up the solar panels so I can get everything going. Can I add chemicals before I start the filter?? Thanks so much. I love how people are so helpful here. ~ E