according to the pond armor website, johnptc used it on his 5000gal tank. he's listed in the photo's section... heres what the website said
"CUSTOM 5000 GALLON ARAPAIMA GIGAS TANK
This custom tank was built to house large fish. The tank body was created using concrete block, sealed with Competition Blue Pond Shield. Afterwards the acrylic windows were put in place with a stainless steel frame using a combination of Pond Shield epoxy and a special Dow Corning silicone. The same method was used for all of the filtration pipes coming through the walls."
with this photo listed:
"CUSTOM 5000 GALLON ARAPAIMA GIGAS TANK
This custom tank was built to house large fish. The tank body was created using concrete block, sealed with Competition Blue Pond Shield. Afterwards the acrylic windows were put in place with a stainless steel frame using a combination of Pond Shield epoxy and a special Dow Corning silicone. The same method was used for all of the filtration pipes coming through the walls."
with this photo listed: