there are just some processes that do not do well biologically. if it is bio it is alive and will either live, multiply and attach itself to the equipment and creat a problem or die in solution and cause a problem. the only successful fogging systems i have seem are sterile enviornments with chem ferts. the solutions are created to be hostile towards living organisms, i.e. fungi, bacterial, viral or parasitic little buggers.

the biggest problem i have seen outside of the equipment becoming unuseable is finding something that is safe to use around fish that will control rot/fungas. i have found nothing that will work effectively and no publication/info i have read has a convincing arguement for any organic control that is non-toxic to the aquatic inviornment.