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Hi, we constructed an Oxfam water tank, 70 and 90m3, on an elevated platform. The platform consists in a round brick wall back filled with brick chips and sand. On top of the tank platform we erected the tank. Inside there is at 4 inch sand layer to protect the tank liner. Now we discovered over 60 small holes in the tank liner caused by probably termites from the bottom into the tank. The termites must have been in the backfill material and eat the liner to reach the comfortable stable and cool temperatur of the tank. How would you get rid of the insects? Concrete layer between liner and platform as a physical barrier? What about insecticides, but that might not be the greatest option regarding the proximity of drinking water? Any advice or ideas? :-) Thanks!

Hi, Hey, we constructed an several Oxfam water tank, tanks, 70 and 90m3, on an 2m and 3m elevated platform. platforms. The platform consists in of a round brick wall back filled back-filled with brick chips brick-chips and sand. On top of the tank platform we erected the tank. tanks. Inside on top of the platform there is at 4 inch sand layer to protect the tank liner. Now we discovered in two tanks over 60 small holes in the tank liner liner, caused by probably termites termites, only from the bottom into the tank. tank, no holes in the walls. The termites must have been in the backfill back-fill material and might eat holes into the liner to reach the comfortable stable and cool temperatur of the tank. tank. How would you get rid of the insects? Concrete layer between liner and platform as a physical barrier? What about insecticides, insecticides as a chemical measure, but that might not be the greatest option regarding the proximity of drinking water? Any advice or ideas? :-) :-) Thanks!