Ha, that's crazy you mentioned that media test, right after i posted this i filled two jars one with straight tap water another with tap water and a small amount if Vinegar. Without media in in it the water was 7.8 like i said and with Vinegar it was 6, then I put two of the river stones in each and am gonna let them set for a bit then test again to compare a before and after on both. I'll let ya know how that turns out.

My fish seem very happy but if it wasn't for the slow decline in plant health i wouldnt be so worried about it which is why I'm hoping its a pH problem and not some kind of other serious problem.