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Eddie_JYB

10mm Acrylic for pond window

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If your tank walls are very rigid, acrylic is fine but if your tank walls will flex ( IBC, wood, fiberglass etc) then polycarbonate is best. Acrylic is rated at 13 times the strength of float glass so 10mm acrylic is the equivalent of 130mm float glass.

I would halve that to provide a better safety margin though. And larger sized panels also need to be taken into account.

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Use curved corners on your tank cut out to reduce chances of splitting. The viewing panel should go on inside so pressure works in your favour so it's corners won't matter.

Don't fully tighten your screws until the silicon hardens. Your using the silicon to make a gasket seal. Silicon doesn't stick to PE very well, even if rough.

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