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High-contrast black markings on a white background
Sub 20 Bond paper
Hip Chain Thread
streams and lakes
stable base
Hester-Dendy Sampler, Round, 14-Plate, Pkg of 10 First Aid Supplies High-contrast black markings on aProduct Code: 150 A55 This inexpensive, compact and lightweight device has become a staple in the field and is similar in function to the periphyton. The most adaptable artificial substrate sampler on the market, its EPA recommended in 2 versions. Suspend it, float it or attach it to submerged objects such as boulders or stakes. Leave it in place for 2 or more weeks, then scrape the critters off the plates and analyze in the lab. Constructed of 1 8 (3
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