my tank has bad stringy allgae and cyno starting. ive been doing my water changes through a Glacier water outside of most super markets when i moved to a town that doesnt have rodi water for sale. so thats my source of nutrients i believe. but my question is what RODI system do you recommend and how much of a water change is recommended on a 150gal tank when i get this rodi system? starting to affect corals and anemones. im still new to this too. so bare with me