pH6-6.5 could be a bit low for some SAs and too high for other SAs. What fish do you keep?
As mentioned above, crushed corals are cheap and work really well for buffering pH. Put a bag in the FX5 and your water will be in the upper 7s.
As mentioned above, crushed corals are cheap and work really well for buffering pH. Put a bag in the FX5 and your water will be in the upper 7s.
