Ona Block Fresh Linen -- 6 oz Filters Our pH adjustment products are

Our pH adjustment products are of superior quality and stability compared to the cheaper

Mix as a concentrate at 0

OMRI-certified organic coco coir

Stainless steel penetration electrode allows for direct measurement in soil

6 in square reach through holes

Ona Block Fresh Linen -- 6 oz Filters Our pH adjustment products areThe ONA Block Fresh Linen is ideal for small areas such as closets, foyers, attics, cars, gym bags, boats, kitchens, garbage cans, cupboards or vents. Simply remove the cap, or punch several small holes in the cap and place in desired location. The ONA Block measures 3" x 3" and will fit in most places. The ONA Block will release its powerful odor neutralizing agent and keep the location free from undesirable odors. Replace as necessary.