My son has scored a Craigslist catch.
A 90 gallon tank and stand for $50. Tank is about 6 years old and was built using black silicone.
We understand the mixing of saltwater, and the 'live sand', but RO water feels like an overkill. Perhaps if we were keeping corals and other live sensitive marine invertebrates I would be more understanding. When I was a young boy, our favorite Chinese restaurant had a saltwater tank on display, surely they weren't using RO water in the early '60 now were they?
DI water should be plenty pure enough for a saltwater fish only tank, right? I mean, everywhere we look (locally) and read online, advice is to use RO water.
Would love to hear your thoughts, and perhaps suggestions on what makes a good RO unit.