All the other fish in both tanks seem fine although the barbs seem to be scratching in the 75. I thought that a gradual change in PH is ok but a sudden change would harm all the fish ?
< Gradual is ok but sudden shifts in pH especially below pH 7 usually mean that the buffering capacity of the tank is gone and it may be ready to crash.> I have tried to include a couple of photos to see if you can see the difference in colour between the two fish . Image 471 shows the sick fish and 473 shows a healthy fish. < Sorry, the photos did not make it.> Any ideas ? < If the tank is in good shape with no excessive nitrogen problems then I would start looking at possible protozoa infections. It is similar to ich but does not develop any white spots. Try treating the tank by heating up the water to 82 degrees and see if that makes any difference. Then I would think about treating the tank with clout.-Chuck.> Crushed coral to pH buffer a FW system Hello guys,
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