"fishgills" wrote in message
...
|
| Just wondering what did reefers do say 20 years ago if they wanted
to
| keep corals?

20 years ago, for all intents and purposes, they didn't, at least not
for long, or with any huge degree of success. From what I've read,
most of the tech we use for our marine tanks has been developed in
the fairly recent past.

billy