Originally Posted by Exteremecheddar123
My dad was talking to a friend who works at an aquarium and he said that the ro
is not necessary if you do not have corals.
You can get away with not using ro
water...but it can come at a cost. Who knows what is in your tap water? There are many unknowns that can build up and cause issues, things that are good for you but not good for fish in a closed system. My ro
has been down for some time due to large amounts of fecal matter in my spring water. I've been using distilled water from Walmart with pretty good success...been over a year with it now. There is algae growing in the tank, as is to be expected, but with my skimmer, refugium, and media reactor it is doable on my end. Just don't expect a pristine, algae free tank.
Of course not having reef lighting can also assist with holding off algae growth as well.