Mold has been around for millions of years it ain't going away even though you don't see its there...i work construction and see mold in house with out fish tanks... I don't know why people freak sooo much(real money maker for me
)..sure it has been linked too some health problems but that's why we have a immune system...i personally run dehumidifier/air purifier... IFind occasionally mold on wet windows but whip it up disinfect area a month later its there again...im not worried about it we all breath in mold spores from time too time lol