If your PH is at 1.025 I would expect your fish to be grilling from the inside out.
However, salinity shouldn't make a difference
I agree that if your fish are eating and swimming that is a good sign. However, higher salinity also means higher chances for parasites.
I stocked mine with cleaner shrimp and a cleaner wrasse. Seems to do the trick to keep them ich free.
Later I'm going to add a UV sterilizer to the mix which should also help.
A blue hippo scratching might be the first signs of ich as I heard it affects fish like a bug bite. Itchy and a deep desire to scratch it. Mine did that in the july ich break out. Hippos are ich magnets
Your clown might also have staked his claim
Also, fish love to swim in the currents. I added two powerheads and the fish love it!