So after doing some research on Reverse Osmosis Filters I started to wonder how and if it is even possible to set up an R/O Filter in an aquarium tank. I have no where else to store water so my 30g tank that is already set up, is the only place I can setup the filter. When I say I have no where else to store it, I mean I have no space, I live in an apartment so this is my only option. I will need about 10 gallons a week for my 50g Aquarium and I was wondering how I would set it up. I know they come with instructions but most R/O Filters are attached to water lines. My idea was to simply fill my 30g tank as I drained a portion every week and just have the filter keep filtering the water in the 30g. This was before I did alot of my research so now I dont know if this is even a good idea. When I read that the filters produce 75 GPD I thought the water had to be filtered a long time to be Pure but now I see these Sink RO Filters that basically RO Filter the water in seconds (I think) Can someone please help me, I really need this for my water as my Tap Water has some really bad chemistry and getting water from somewhere else would be a hassle.