there's a reason you cant submerge them, they aren't waterproof, who the heck would stick an item that isn't water tight into their fish tank these days, when the submersible ones are just as inexpensive? granted I still have a few of the old clunkers kicking around just because I don't throw stuff out. but I dont use 'em. god that's scary, you'll only need to get lit one good time off your fish tank before you reconsider the extra three or four bucks the watertight ones cost.
on a side note: I had an old 55 oak trim, I couldn't stand the look of the plastic trim in oak, so I wrapped it in wide electrical tape. I dont think anyone ever noticed it was tape instead of actual black plastic trim.
"[Wabi-sabi] nurtures all that is authentic by acknowledging three simple realities: nothing lasts, nothing is finished, and nothing is perfect." -original author unknown-
125g marine reef tank, 6 gallon fluval edge minimalist aquascape (in progress), 1 gallon aqueon evo 2 betta tank.