Before you start manipulating the phosphorus you should have results of current (baseline) SRP (soluble reactive phosphorus, aka dissolved P, ortho-P) and nitrate. Baseline information will allow you to evaluate the process of nutrient management.
Alternatives. Addition of a blue based dye (a non algaecide) to reduce or slow the bloom would be IMO the best way to start to thin or trim the bloom. 2nd best way would be to use a product called Green Clean-Pro or Phycomycin which has an active ingredient of sodium carbonate peroxyhydrate which is an addition compound of sodium carbonate and hydrogen peroxide (H2O2). The nominal amount of sodium carbonate peroxyhydrate in these products is 85% which corresponds to 27.6% H2O2. A copper based algacide applied correctly would be my 3rd best way to thin the bloom.
Use of a secchi disk would IMO be the simplest way to measure the density of the bloom and monitor your results.
Last edited by Bill Cody; 12/15/17 10:18 PM.
