About 24 gallons an acre for DB-200; possibly 2x's the amount for DB-100 per treatment. Two treatments, applied a month or two apart, are better than 1. One problem that limits how much you can apply, is that DB-100 (liquid) can glob together and roll to the low point of your pond bottom. Doug recommends mixing it no richer than a 1000 to 1. With that in mind, seems you could rototill into or cover a DB-200 layer(dry) with some clay. Then you could get away with applying more.
(Edit 7/21) Doug recommended 6 gal of DB-200 for 1/4ac pond with my level of leakage and sandy soil. He also thought that DB-200 was 2x's more potent than DB-100.
Last edited by SoSauty; 07/21/0909:33 PM. Reason: further elaboration
