HL - Strong hydrogen peroxide (H202) is an algae killer but the important word here is strong. Weak (dilute 1%-3%) H202 is okay to use on wounds and as mouth rinse to disinfect but stong concentrations will remove and eat skin similar to strong acids. If you ever spilled battery acid on clothes and it make holes in the material, that is an example of a strong acid reaction.

Green Clean does make a liquid H202 for algea control, however it is 27% strength H202. The concentration that I use in the lab for digesting algae is 30-35% - very strong stuff. The GreenClean liquid formulation is designed to be diluted and sprayed on surface algae. The liquid form doesn't have a big impact to kill algae as it sinks and becomes diluted to the 1%-3% or less 'strength'. The granular material has a better affect on deeper subsurface algae because it dissolves as it sinks or if it lies on the bottom and dissolves it releases the hydrogen peroxide on and among the algae. Granular material is said to have an affect up to six ft deep before it is all dissolved.
The hydrogen peroxide is best used on the thin skin algae, such as bluegreens, which are most susceptable the oxidation of the soft delicate layer of the some algae.

Last edited by Bill Cody; 05/12/13 09:09 AM.
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