id take ure old silicone off ,only on the inside with a stanly knife then use masking tape 5mm from each corner or bottom were u want to repaire it put ure silicone were you want to use it ,use a medicaine spone the plastic ones to get a smothe finish finish take masking tape off and leave to dry http/www.aquatics-warehouse.co.uk/acatal..._SEALER_83.htmlwell aqarium silicone would be best to use on the safe side,but me and my mate had a debate a few weeks ago ,that normal clear silicone was the same as quatic silicone i know clear has the least toxins as any other ;and no toxins when its dry , but i carnt qwote that its sutable for a tank
i know iv put finish twice iv just read back lolid take ure old silicone off ,only on the inside with a stanly knife then use masking tape 5mm from each corner or bottom were u want to repaire it put ure silicone were you want to use it ,use a medicaine spone the plastic ones to get a smothe finish finish take masking tape off and leave to dry http/www.aquatics-warehouse.co.uk/acatal..._SEALER_83.htmlwell aqarium silicone would be best to use on the safe side,but me and my mate had a debate a few weeks ago ,that normal clear silicone was the same as quatic silicone i know clear has the least toxins as any other ;and no toxins when its dry , but i carnt qwote that its sutable for a tank