I have a strange Black Moor. He's(she's) always been kinda fat and his tail is normally inverted (for lack of a better word). (The tail's ends float upward instead of drooping down like the ones on my other fishes.)
Anyways, I came home and noticed him(her) resting upside down at the bottom of the tank. When I tapped the glass, he started swimming as normal. Now, he'll swim around a little and eventually drift back upside down. Scary!
I tested the water and sadly discovered pH and Nitrates out of whack:
pH--6.6
ammonia--0
nitrate--20 or maybe higher (This has never happened before. How do I fix it?)
filtration/tank size--two 20g power filters on a 30g tank
conditioners--Kordon's NovAqua
food--Omega One's small pellets; TetraExotic's sinking sticks; Hikari; peas; frozen shrimp
water changes--8g every 1-1.5 wks (I just changed the water a couple days ago.)
Again, the pH and (especially) nitrates levels are surprising. Would they have anything to do with this?
Should I go ahead and use my Proper pH 7.5? (My water is a little hard and might resist this stuff.)