pH is 8.4, not 5.4. I've looked at those API test cards ad nauseam (at old LFS job) and recognize the color anywhere. So don't add buffer at the moment. The number on the card does kinda look like a 5 though.
Fish have always been very tolerant of salinity changes IME--even relatively large ones. Inverts and corals, on the other hand, are far from it.
Fish have always been very tolerant of salinity changes IME--even relatively large ones. Inverts and corals, on the other hand, are far from it.