dark green water

[PoolDoc]

Hi Becca;

If you would, please give us complete info about your pool here:

Pool Chart Entry Form
Pool Chart Results

Also, as Nick correctly noted, we need to know your CYA level, and also your calcium level, before we really dig in.

Meanwhile, using bleach is the safest way to chlorinate, since we do NOT know your CYA or Calcium levels. Reasonable doses on your pool would be 8 gallons of PLAIN 6% household bleach, or 4 gallons of FRESH 12% commercial bleach, added each EVENING, till the pool changes color. Once it does, add another 8 gallon dose and then
EITHER
+ brush to stir up any algae piles on the bottom,
OR
+ carefully vacuum the pool to waste.

But, you do NOT want to stir up that algae, till you've killed what's floating AND have a high chlorine level in the pool. Particularly if you brush, you may have to add 8 gallons before you brush and then 8 more AFTER you brush.