I treated my .28 acre pond with db 100 (6)gallons. I waited a week 7 days, before adding another (6) gallons. I installed a gauge i can take readings on am and pm, currently i am loosing 2.5 inches of water per day, 24 hour period. Just pretty frustrated with myself actually. I did everthing pretty right with this pond from compaction to having good tested clay brought in.. to the db-100 to slow things up and to seal my new surface.. what now ?????????? well the best thing is that my landscaping around the pond is growing well.. My wife says the pond will be the nicest landscaped hole in the ground she has ever seen !!!!!