expiredphoinix | Staff posted May 12, 2025 07:22 AM
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expiredphoinix | Staff posted May 12, 2025 07:22 AM
$29.99: 48-Oz Wet & Forget Outdoor Moss, Mold, Mildew, & Algae Stain Remover Multi-Surface Cleaner at Amazon
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Just FYI, costco also has this.
Ready-to-use: 1.65% alkyl dimethyl benzyl ammonium chloride
1 Gallon Concentrate: 9.9%, to be mixed with 5 gallons of water to produce a 1.65% mix
Hose end: 30% concentrate - infers that this makes 6.8 gallons at 1.65% ready-to-use concentration
This should make 6.8 gallons total mix if you prefer to use a sprayer.
It's a shame since this used to be ~$17/gal for the concentrate a couple years ago at Lowe's and WalMart (currently $28.12, or 6% more per finished gallon if you don't mind doing the math). The active chemical, after a bit of sleuthing, really is a algicide, but the specific formation is not divulged (only the general alkyl dimethyl benzyl ammonium chloride) The base chemical has multiple variants which target difference algae cell wall types, so you can't just grab a generic form and expect it to work similarly.
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