Well thats a good point, I've been using it for about 7 months now. Based on what you've said, I'll be watching to see if there's an issue, but so far so good.
Also, I've carpeted nearly all exposed areas of floramax, so that may be helping hold it down and keep it clean.
I've wanted to go aquasoil for a while but I'm still filling my piggy bank so I can afford it
I definitely would agree there are better options, just for the price it seems pretty good