Hi,

You don't need to add any baking soda(that raises TA, and yours is okay where it is) or borax (that raises pH, and yours is fine). You need, with a CYA of 88 (where did that number come from? If it's from the K-2006, then just round it to 90), to be keeping your chlorine at an absolute minimum of 5 ppm, and you're on the verge of having to jump up to a minimum of 8 ppm. Considering the amount of rain you've had to dilute the chlorine, and the fact that it's so low now, it probably needs to be shocked. For a CYA of 90, that means bringing it up to 20 ppm and holding it there until you can measure chorine at night and again in the morning at sunup and not lose more than 1 ppm of chlorine.

The rain didn't cause the algae--more likely, failure to check and maintain chlorine levels during the rain, combined with your high CYA with low chorine, are what caused it.

Where in Louisiana are you? I'm close to Shreveport...