mwrmma
Aquarium Advice Activist
Hi there first time on this forum and it seems like a great place for information. Just wondering if anyone has any views on using RO water for a 90 gal FOWLR tank. it used to be a freshwater tank, but i am in the process of converting to SW, and i want to know if it is really that big of a difference to ordinary tap water. also, if anyone has any suggestions for me just starting out, any info would be greatly appreciated.