My concern with saw dust would be it floating and then the db100 or 110 (whichever is available) would make a mess of it. Perhaps a test in a bucket to see if the sawdust would sink in time for the db to still be active with it. Is the db110 the stuff that is supposed to be 40% more effective? When i got db100 from Doug at Pond Drs, he said they were still testing it for not hurting fish. Can i assume it is safe with fish now?
My DB report - jury still out. it has rained so much it is hard to tell, but it still looks like my pond loses about an inch a week and i am still unable to tell if that is evap. we have not owned it long enough to have a reference on the loss. plus it was so dry last fall, there is no comparison to the level then versus now. My deputy pond level monitor (wife) still contends we have helped the seepage. i continue to say time will tell. thanks to all reporters of db product progress. Rick
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