Today, you can still find fiberglass boats made over six decades ago. These did not need that much maintenance, and they have not yet reached the end of their life span. However, because fiberglass tanks often store much harsher chemicals, you can’t expect this type of tank to last as long as a fiberglass boat.
for more: https://www.beldingtank.com/the-durability-of-fiberglass-storage-tanks/
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