Hello all. This is my first post here, and I really hope that you guys might have some advice for me. My problem is this. I work for a Very large retail store in the PHX, AZ metro area. We were originally using city water to irregate the plants (mainly desert bushes and palms) on our huge property. After the construction of a roughly 100,000 gallon pond (for aesthetic purposes) the city switched our irregation to come from this source. Maybe if we were in a different climate this would have worked well, but since 99% of our days here have absolutely no clouds in the sky, we have developed extensive algae growth (both filamentous, and waterbourne) that tends to just clog our drip lines. We have already lost some very expensive palms because of this problem. I'm wondering if there are ways counter this problem. Since the water is usually above 95 degrees in the summer, and in the 50's during the winter, it isn't a very hospitable environment for fish. Not to mention that the blue herons will instantly devour any fish that I add. Is there a tolerable level of chlorine that the plants can endure, that will kill the algae? Any advice is appreciated. Thanks!