ok im back here is the update:
the groupers died but the tang and eel are still in there
i have done a 35 gal waterchange thurs & sat
I bought a new bigger skimmer...
didnt siphon the bottom for food but will do that today.
took out the filterpad from the filter tray on the sump and i'm using "poly filters" they are supposed to wipe out the meds and all in the water and change colors and work like carbon but i havent noticed a change in the color of the pads so im getting some carbon today.

Gary trust me i retested the Ph three times cause i thought there was a mistake i even used another new Redsea test kit and the Ph was as PURPLE as Barney and i tested before any meds were added... I understand how the ammonia=nitrite-nitrate breakdown happens and i know this is what led to this demise ... :cry If i cant stablize this tank one last time thats it....im OUT for good... i cant take losing any more fish. My passion is the fish way more than the corals.. i have my 58g reef thats blooming right now for some unknown reason cause i do nothing to it just top off and THATS supposed to be harder to maintain BUT i cant keep my darn fish alive???... thats just crazy... :angry

Thelma :(