Was the tank running a DSB before the crash as well? IMO you were ripe for a full tank wipeout regardless of vibrant dosing. I'd also attribute your major algae issue you tried to remedy with the vibrant to an old DSB that was at the breaking point as it was. Just not a long term sustainable filter system. Works great until it doesnt kind of thing. But hey if thats your go to, then youll probably get another 3 years til it blows up again. As long as you know the limitations I dont see anything wrong with it. Just find it unlikely a vibrant dose was the root cause of your crash.