I am currently getting my RODI at the LFS, someday maybe that will change. Either way I am storing 5 gallons and I noticed that the PH is low in that water...probably no shock to those of you that have been doing this longer than 5 weeks. I assume adding this water in will slowly drop my PH and then when I do my weekly water change it will spike back up to the 8.2 level. Being a 13.5g Nano tank I would think this will swing more than those of you with big tanks. My question is, what do people add, if anything to their top off water? I was thinking of getting some Seachem Reef Buffer and adding it in until it gets to 8.2 or so? I plan on getting an ATO in the next few weeks, probably the Tunze based on research. I don’t have any dosers yet and that may be awhile since a new light is also in the future. Can I add reef buffer and calcium together or how do people handle this manually?