[Mishri]

Interesting idea.. i'd get the temp to 106-110 if possible. which will feel very hot to the touch.. for 2 hours.. just to be sure. The other thing to consider is ammonia.. usually there is no filtration going on so you can probably use an ammonia binder if levels get too high... but with your method you might be able to run a filter, as long as it keeps running while the water is hot.

I'd do a wipe down of all areas with water splatter with a cloth with freshwater before you start it, once it hits 106F and at the one hour mark, then by the 2nd one hour mark it's highly unlikely any would survive. The only areas I'm seeing as a possible issue would be around a HOB filter... if you are using an in-tank sponge filter I wouldn't anticipate any kind of splashing...