Hi, so I just finished my first SLAM 2 weeks ago and enjoyed a clean clear pool with great numbers until the storms hit. Monday night we had torrential downpours overnight in Houston, between 6-10 inches fell, and I woke up to a Pre-SLAM looking pool, in just 12 hours! The numbers and picture are below, I'm curious, can that much rain bring down enough junk from the air to cause an algae bloom, or could it have been overflow from the surrounding ground running into the pool because it couldn't drain away quick enough? I'm thinking the latter, but have to ask...
Before the rain (monday at 7pm) , my numbers were:
FC 8 (Target 9-10, added bleach to bring up to 12 overnight)
After the rain, my FC reading on Tues morning was 9, probably due to dilution from the rain, but certainly high enough to keep algae away, right? Is there any way algae could bloom in 12 hours, or should I assume it was just runoff from the surrounding ground? I've added bleach to keep the FC at 12 or above since, and CC still is very near 0. I've seen my filter pressure raise 25%, 17 up to 21, so I know it's clearing the junk out, but I'm "shocked" at how nasty the pool looked in the morning after all the rain, check out this pic... Thanks for any help/guidance, Jeff