holy cow !! is that your tank in your avatar pick?!!!!!!!! )
i am sooo jelouse, please post some picks of it, or some links im dieying to see it
and as for the coral it will raise your ph and amonia levels up way high, that is what i have heard, but make sure its dead first, not all live coral, or any can live in brackish..... but i have heard the vinager test will work for the coral, am i right?
The pH in a brackish tank should be kept at around 8 so the coral raising the pH is not a problem, in fact its more of a bonus. I have crushed coral mixed into the substrate of my brackish tank to keep the pH high.