Quote Originally Posted by PoolDoc View Post
I think we need to do a better job of explaining to pool owners the options for avoiding any bacterial growth over the winter! It doesn't effect everyone equally, but for many it causes some painful start-up problems.

Hopefully, we can help you avoid this next year!
Most years it hasn't been a problem. But now and then the issue pops up.

A quick update:

Last night after checking FC level I shut down the pump (up until now it's been running 24/7). This morning's test showed no FC loss overnight.....yea! I don't know if that last shock treatment did the trick or turning the pump off last night had something to do with it. Does aggitation cause FC loss?? I know in another thread some time back there was a discussion about whether using one of those magnetic stirrers when testing CL altered the results as apposed to just swirling by hand. Was there any conclusion on that?

Btw, the first night after the last shock it lost 11ppm overnight.....however we did get some heavy rains, so that may have contributed to the loss.

So once the FC drops to normal levels, I'll start up the SWCG again and see if FC stays steady, day and night.