hello everyone, I constructed a glass aquarium (45x32x36 cm) with 5mm glass. I "glued" the front, back and side glasses on the bottom of the aquarium with silicone proper for aquarium use. I let it t cure for 5 days and then i notice that when i push (with considerable pressure) with my finger the one side of the tank it seems that is slightly moves (1-2mm max) from the joint and then comes back. That happens only when i press it on the top of the glass close to the corner/joint. Is this normal or i have to reconstruct it ???? If you have experience on aquarium constructions please help !! Thank you