i only used to have bad smell when feeding massivore and get it here and there now. i believe your water perams have something to do with it and definitely uneaten food will stench up the room. i only feed massivore mixed with nls in the morning and other foods in the evening. when i used to feed only massivore it was nasty nasty nasty!!! you need to vary the diet.
It kinda smells like a mixture of shrimp and mashed up fish guts haha
The only time I ever spell it is when I squeeze the air out of the package and seal it other than that it dosent really smell bad to me
I've ordered quite a few bags of both pellets since I last posted on this thread and I still have yet to smell any kind of stench from either of them.....not that I'm complaining.