I am attempting to shift the recent discussion from the PSF thread. @Fishmyster has done some good work, I think its something that needs to be explored further. @wildmanyeah said : Our local streamkeepers did an interesting study "You get some pretty crazy pH numbers when you let cedar bark and leaves sit in water overnight. We recorded about 5.0 as compared to 6.5 in the creek." I asked what the ideal PH for invert growth and they said 7.0. Ive took your Touch Fishmyster and ill always ask questions now for in river water quality! Perhaps you could team up with your local stream keepers. We are seeing acidification of our oceans affecting coral reefs and shellfish. Do you think this is related?