Hey everyone just got a hopefully quick question that will get answered. I have a 10 month old motoro stingray and his ph in his tank is 6.0 which i know is good.But my only question is when i do his water changes the clean water is always at netural PH i cant get it to goto 6.0 i know your suppose to hat the PH matching but the tank seems to still change it back to 6.0 after a couple of days after the water change. should i be worried about this is it causing my ray harm he is eating 40 shrimp a day so he doesn't seem to be noticing a change i was just curious....(if i leave my clean water out longer the PH gets to hi for him so i try to do the water changes when it read's neutrel ) Hope you guys can help me out!!