If Tilapia aren't legal to be stocked in NY, or they are legal and the OP doesn't stock them, then the algae will need to be treated bi-weekly. It grows back that fast.

www.hoosierpondpros.com


http://www.pondboss.com/subscribe.asp?c=4
3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).