I have a fluval flora tank set up using the fluval shrimp stratum. It buffers my water to 6.4 to 6.5. I purchase RO water and this water is 7.0. What is the best way to lower the RO water pH prior to using it in my tank? I would think the pH swing would cause issues with my shrimp(ss crsxsnow white)(F1)'s. I really do not want to discolor my water..... But will if I have to. What do you guys do for topoffs and water changes?