again ,how is this helping OP. ;StopYou did read your post, right? "no place for shaming, bullying..." but "shame on those of you...". Maybe I'll just leave you with that thought...
And just so we're crystal clear, there's a big difference between doing months of reading, research, asking questions (LFS, other reefers - forums like this), getting the right setup, following solid advice and despite your best efforts - losing a fish, invert or coral - and beating yourself up over it. And then going on a forum, listing what you did (or didn't do) and asking for suggestions on what you could change and/or improve upon to hopefully avoid a repeat scenario. I see at least a half dozen of these types of threads on R2R every time I login.
Square tank for a shark. Apparently (as I've learned), this is a pretty huge deal breaker for sharks. I also know that (having worked in a LFS for the past year) that while you can (and some do) successfully convert freshwater tanks to saltwater, it's not necessarily the most ideal scenario. And it was pretty obvious from the first photo that this setup was lacking some key elements like flow and filtration (at least insofar as the new addition was concerned).