Ph is 7.4. Not sure what else could be the problem. I use api leafzone, seachem nitrogen supplement as directed. All my other fish seem fine. I have micro crabs too that are just fine also. Not sure what else could be wrong. Oxygen level too low? Ive noticed not as many bubbles on my plants lately with a new, more powerful filter, but its not too much more flow, and the water seems cleaner, less film on top...