My new pool has been opened for less than 2 months. In that time, we've had two substantial storms and, after each storm, my pool has turned a greenish tint and cloudy. Both times I believe I had adequate chlorine levels (I test every day and it has never been below) but it didn't stop the greenish hue from appearing. The first time I didn't do anything different, just kept up my FC, and in a few days I was back to crystal clear water. This last time ( documented here http://www.troublefreepool.com/pool-...rm-t36851.html ) it was a little greener, so I've shocked it 3 nights in a row. Although it is still a little cloudy today, the 4th day since the storm, it is obvious the pool will be back to clear as long as I keep the FC where it needs to be. My problem stems from the fact that I don't want my pool to be cloudy for 3-4 days every time we have a storm, so I'm wondering what I can do to prevent it other than maintain adequate FC levels, which I have done but it didn't stop the algae.
In the link above, I mention an auto-fill I have on my pool which was not hooked up. I hooked it up this weekend and there was some algae in there that I had to clean out. I wonder if this was the cause of my sudden green tint after a storm. when the storms hit, they would literally fill up the pool with as much water as it would take. I can logically assume that this also would've increased the water level in the auto-fill and then possibly some algae could flow back into the pool. now that this is cleaned out, I'm hoping algae outbreaks after a storm are a thing of the past, but I'd like to be safe and use an algae preventor if they are worth the money.
Should I put an algae preventer in my pool if a big storm is being forecasted or are these things a waste of money? from what I've read, it is impossible for algae to form if FC is at an adequate level, is that correct? if so, maybe I should wait until the next storm to see what happens. if the pool stays clear, I can assume the auto-fill was my problem. if it gets cloudy again, then use an algae preventor going forward?