Oxalic Acid Fine Powder, 99% Pure, Multi-Surface Rust and Water Stain Remover, Wood Bleach and Brightener for Decks, Hardwood Floors, Furniture, 10.1 lbs (160 oz), Pack of 1

If you have a shallow well and live in central Florida, this is what you will use to get rush stains off your driveway.

Cleaned rust off concrete when nothing else did. Be careful not to use too much as it turns concrete white but works great.

I am a new beekeeper this year, and am using oxalic acid to control varroa mites in my hives. I use 2 grams in each hive (I have 2) periodically. At that rate this bag should last until about 2040 or something!

Got this to do OAV in my beehives. Works great.

Product does not match description. Labeled as fine powder, this is large granules. Not acceptable.

Used it to treat for mites on my bees seems to have gotten the job done

Haven't used it yet but I'm sure it will help my bees.

It was exactly what I needed to make wood bleach/cleaner.