Crystal Clear...until now! Help!

[lstewaMN]

After a week of cool weather pulled the solar cover off 20' AG and saw a "dirt" ring around the outer edge on the bottom of pool. Tried to vacuum it up but it was too fine. Chemicals all tested within good ranges that day. After a couple of days of the kids playing and stirring up the water now the entire pool looks green and there is a light brown dust on the bottom everywhere.

I backwashed the sand filter thinking because the pressure gauge was slightly in the yellow range. Lots of brown water came out. Ran the filter again that night, water is the same color and the dust/dirt is still there.

Tested again today:

CYA 40
PH 7.3
FC 5.5
TA 180
CH 210

Not sure what to do now or exactly what this stuff is. We had rain a couple of times over that cool week so I was thinking it was just fine dirt/pollen but now the whole pool looks green. The lowest my FC has gotten since discovering the "dust" has been 1.5 and I bumped it back up to 4/5 right away.

Help please!!

 

[woodyp]

Looks like "Something Wicked This Way Comes" decided to come your way. You should follow the SLAM process outlined in pool school and raise your FC and KEEP it there per the chlorine/cya chart there.

 

[Donldson]

Did you test your CC level? If you left the cover on for a week that may have been on the high side.

 

[lstewaMN]

I was wondering about shocking so we will do that. Unfortunately we won't be swimming at our BBQ tomorrow with friends.

The CC was .5 at first and it's zero now.