Size: 61 x 30cm / 61 x 40cm / 76 x 46cm / 91 x 50cm / 122 x 46cm (Optional). Size 4: Approx. 91 x 50cm / 35.8 x 19.7in. Wipe the glass surface on the back of the aquarium, add a little detergent to the water (to reduce the viscosity of the glue), spray on the glass surface (do not spray a lot), or wipe with a damp cloth.
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