hi everybody this christmas my parents gave to me a 40GLL tank and yesterday I have broken it and my brother gave to me a 5GLL tank so look it I have already decorated it look
That 5 Gal tank looks really neat. It looks like the font and sides are one piece of glass (rounded front corners). It looks like the back is another piece and the only vertical silicone joints are in the back.
Or get a piece of cork bark and wedge it between the glass. Cork bark works really well, though it's getting harder to find. In the US it's sometimes available in the reptile section of the petstores. It's also used to mount orchids so it's sometimes also available in gardening type stores. Not sure about Albania, but if you can find cork bark it's cheap and easy.