tubby are great source of protein.. life or dried, though live is better.. jus like us, eating fresh or dried meat, of course fresh meat consist better nutrients..
BUT.. you must know the source.. jus like meat again.. eating bad meat unknowlingly give you disease!! Like mad cow disease..
some tubby comes from a farm that is not so clean.. and the worm will introduce disease to your fishes.. especially internal infection that is not visible till the final stage (when dying, and it is hard to cure)...
otherwise, tubby is good, but there again, provide a well balance diet.. fruit, pellets, prawn, etc etc..
to me, when come to food, I NEVER consider clouding water as a factor.. just like your own baby, will you jus simply stick to milk jus becuz cooking baby food is more messy??

I dun mind the mess, it is their health that matters..