my 12gal acrylic tank cracked when i moved and i want to set it up again because theres a mantis shrimp at my lfs and i would love to have it but im not goin to give it my entire 20gal and i would like a second small tank anyways. i sealed the crack but when i filled it today it just leaked from some spots. mainly the bottom cracks. the cracks are on the bottom corner and extend along the three edges of that corner. is there any way to seal the cracks with silicone so that it wont leak?