I'm so sorry about Sol. :[ May he rest in peace!
Also you might want to try cleaning with the canning salt recipe in this thread titled "To Sterilize a Fresh Water Tank"
that was posted by Lion Mom. You might try that after your vinegar wash just to be extra safe!
Make sure to wash not only the tank but the filter and all the little bits and pieces in the filter too!
I'd throw out ALL of your filter media too. Even the little screen that's for biological filtration.
It's true that Biological filtration along with some mechanical filtration is all you really need in a tank but you can easily set that up by purchasing a pack of AquaClear Sponges/Foam filter inserts. They're better than the small screens for bio-filtration that most kits come with. The 30 gallon refills work best in my 5 gallon's filter. =] Just stuff your filter full of new sponges and toss everything else. =]
Good luck with your next boy! <3