I have an old 20L tank with one of those sliding screen tops. The plastic frame that the top is supposed to slide in and out of is coming loose from the glass. Two of the four sides are completely loose and just held in place by gravity.
Any ideas on how to repair it? I was thinking maybe using the silicone aquarium sealant. I'm not sure if it would create a strong hold between the plastic and glass? But at least it would be non-toxic.