Quote Originally Posted by Kateyru View Post
**** Can algae, over time, raise its tolerance to FC? That is to say, if you don't get all the algae when you shock (due to human error or whatever), at some point in time after repeated unsuccessful attempts to shock, will the FC need to be maintained > 3 - 5 ppm in the future to keep algae at bay?
I don't know if algae can become more cl tolerant through selection, makes some sense that you may be cultivating a cl resistant algea population. I do know that once you've raised the FC high enough for long enough to kill that population, you won't have to be concerned raising your base cl level for the resistant population as it will be gone. Any new algea that enters the pool will not have been through the selction process and will be no more cl tolerant than all the other algae.