About a year ago I put a deep sand bed in my sump, that's right I'm still old school, so yesterday morning I woke up to a cloudy tank and all the rocks covered in sand the glass holding the bed of sand expired, it's approximately 15 kg of sand and a layer of almost 6", unfortunately, when the glass expired, a large part of the sand fell into the return pump section and it was as if snow had fallen inside the tank. This topic it's worrying because the sand accumulates nitrogenous compounds in the lower part of the bed, but fortunately my fish are fine, very busy yesterday so today I'm going to relocate the sand and clean the sump, but that is not my biggest concern, I just remember that I glued the crystals that held the DSB myself, so that silicone was the same that I used to glue the downpipe, so there is a possibility that the silicone will fail there and drain my tank completely, that It would be a disaster that would make me lose the entire system, so I was thinking of a solution, since I also discovered a little water dripping little by little in an area of the polystyrene that is under the tank, and I don't know where it comes from, it seems that the tank has an expiration date or something similar.