I will say "no" from personal experience. It doesn't really do the job very well. Salt is much better to use with the iso. Not to mention, the rice will get stuck inside parts of the bong sometimes.
I'd say your fine. I've done ISO & Rice by itself many times and worked great. Long as you are using a regular tube. No percs or anyting obviously or that would cause problems.
to clean any piece...i use carb cleaner, straight up the best thing ever. my bubbler has never been so clean. it brought it back to new. and obviously i recommend washing it out a couple times with dish soap after use of the carb cleaner. seriously go to o'rielleys auto parts and get a can, and for bubblers and shit make sure it has a straw to spray through.
your just the kinda kid who threwup off his first or second time puttin down straight shots of it. Bacardi