Juwel Poster Fix is an oil that is used for attaching and enhancing the colours of poster backgrounds to aquariums. A much better alternative to sticky tape, the background is easier to position, it attaches directly on to all of the glass making the picture look more 3 dimensional. Colours too, especially blue punch through the glass much better, looking just they do as they come out of the packet. Using Juwel Poster Fix makes a massive difference to the overall appearance of the finished aquarium. The poster can be easily removed and changed if required. Contents 30ml.