Last week I happened upon 5 metaframe tanks, some with hoods, old filters, iron stand and a piston driven air pump. All look in great shape. Bought the whole lot for $50. My question is this: can the metaframes be used for saltwater? I have read in different places that they are fine to use for a reef and others that said the salt will destroy the metal. Any ideas, thoughts or experiences would be great. Thanks.