I have had a problem with angel fish getting cloudy eyes and what looks like an infection between the eye and mouth. Sunday, I changed most of the water, cleaned the filters (the bio-filter looked to clean to be active), treated with Para Guard, Amo-Lock, and buffered the pH with CaCl. The pH was below 6, slight ammonia, but nitrites were zero and nitrates were low. I did purchase a few tetras, angel fish, and a loach. Everything seemed good, except for cloudy water, which is normal after adding CaCl.
Monday and Tuesday, the water remained cloudy. The angel fish with eye issue was near death and euthanized. Wednesday, the tank had massive fish death, a nasty odor, pH less than 6 again, and nitrites present. Changed about half the water, added CaCl and added Stability (bio-filter additive).
Today, Thursday, no new fish loss noted. Tank still has a foul odor, pH of 6 at best, and no nitrites. Added some more CaCl. Will recheck pH later tonight and probably will add more CaCl.
What is going on??? All this happened in a few days, from a reasonably healthy tank to the current issue.
Background: 125 gallon tank, two Rena filters, heavily planted (plants healthy), overall stable tank with stable chemistry, and no foul odors. I do live in an area with water on the acid side, but is always normal after a water change. I am also a well experienced aquarium guy with 30 years experience.
Any help from anyone???
Monday and Tuesday, the water remained cloudy. The angel fish with eye issue was near death and euthanized. Wednesday, the tank had massive fish death, a nasty odor, pH less than 6 again, and nitrites present. Changed about half the water, added CaCl and added Stability (bio-filter additive).
Today, Thursday, no new fish loss noted. Tank still has a foul odor, pH of 6 at best, and no nitrites. Added some more CaCl. Will recheck pH later tonight and probably will add more CaCl.
What is going on??? All this happened in a few days, from a reasonably healthy tank to the current issue.
Background: 125 gallon tank, two Rena filters, heavily planted (plants healthy), overall stable tank with stable chemistry, and no foul odors. I do live in an area with water on the acid side, but is always normal after a water change. I am also a well experienced aquarium guy with 30 years experience.
Any help from anyone???