Newpond: I'm afraid someone misinformed you of the merits and capabilities of Aquashade.

1st: Aquashade is generally considered a "preventative" rather than a "curative" measure. So, it may be quite some time before your pre-existing population of weeds and algae disappear - if ever. Once weeds (plants) or algae extend to or near the surface, it is nearly impossible to inhibit enough sunlight penetration to cause their demise. On the other hand, if your weeds and algae are growing at no less than 3' (?) from the surface, the effects of Aquashade "may" help to reduce their rate of future growth.

2nd: The nutrients in your pond aren't likely to be eliminated anytime soon either. In fact, if the Aquashade is actually successful in controlling any algae or weeds, your "free roaming" nutrients will very likely increase - dramatically. However, the presense of Aquashade will (like it or not) be a severe hinderance toward any phytoplankton blooms that may have otherwise utilized any available nutrients.

I don't know if any of this answers your posted question. But, at least it should correct some of the misconceptions that were stated.

Kelly Duffie
Cypress, TX