I'd be grateful if you would post your results as you test your pool phosphates and other levels, and as you remover the phosphates. Remember to test your fill water, too. City water is usually the primary source of phosphates.

Also, I suspect that you will need LESS phosphate remover, if you make several moderate additions of phosphate remover, rather than trying to fix it in one dose.

Keep in mind that lowering phosphate is in ADDITION to chlorinating, and will have NO EFFECT on the algae, until your PO4 levels become lower than 0.25 ppm (250 ppb), and won't be fully effective till you have less than 0.1 ppm of PO4 present.

Thanks!