I shattered my glass door on the top of my tank today , I opened it up to feed them and when I was pinching the food the door slammed down and shattered . I cleaned up my mess but I found this thread fitting as I just did this about 20 min ago . It's a large 55 gallon tank maybe with dual doors on the top . Must have fed them thousands of times and never had a problem untill today . Might just cover that half in plexiglass till I find a replacement .



Not a tumbler myself usually when I break glass I curse , I really hate glass . I am a liability to anything delicate or glass .