"CO2 doesn't seem to be a problem for reefs. We know they've dealt with much more CO2 in the atmosphere in the past, and thrived, and suffered when there was less."

Evidence of suffering with less?
Evidence of thriving with more?
Interview with experts? Quotes from experts?

"We know they prosper in hotter temperatures than it is possible for our sub-tropical waters to reach"
Yes - such a wonderfully all encompassing word "they". Like all reefs are exactly the same! Like every reef on the planet is one type of ecosystem - a reef? They're not unique and adapted to specific environments. Tropics or Tasmania - it's all just that reef stuff, right?

Um, no.

This political rant was utterly devoid of any inconvenient facts or science.