have to be distilled?
does the water to recharge my heartfelts HAVE to be distilled? reason i ask is because i have a RO/DI water filter for my reef aquarium and wondered, is the reasoning behind using distilled water because it has less chemicals than tap water? if so, my RO/DI unit filters my tap to read 0 TDS so it literally removes everything but H2O... so could i use that? or is there something specifically to Distilled that makes it the number 1 choice? thanks