i see post on tank seals leting go. my ? is why do they let go bad stoage leting them sit to long no water in them or ? i bought a used 100 gal was salt useing it for frashwater owner said he had it up and runing 10 years when i bought it was full of water but the very edge of the silacone is cheped here and there ive had it up and runing 6 months or so .should i be worryed that its gonna let go one day ?