55 gallon tank w/ Hang on back Filter with Biological and Mechanical media. Air Stone strip. Drift wood and stone along with fake plants.
Water Parameters: Ammonia 0PPPM Nitrite 0PPM Nitrate 20PPM PH 8.2 TEMP 75F
I had 6 Angelfish now only have 2
4 Molly 2 male 2 female
Had 2 Rainbow Shark only have 1 now
1 common Pleco
And 2 fancy goldfish
My first angelfish died about 3 weeks ago for a reason I dont now which got me worried, a week later another angelfish died a few days after that i noticed that one of them was rubbing its self up against stuff in the tank so I did some research and found out that it could have been Flukes, I treated with API general cure immediately as directed and did the 25% water change, then two more died. But after I dosed the tank I noticed that my angles and one of my rainbow sharks were hang out at the top of the tank alot as if they were trying to get more oxygen. Which makes no sense being I have a hang on the back filter and a nice size air stone strip so their should be plenty of oxygen in the water. Also my water Parameters are perfect with 0 ammonia 0 nitrite and about 20ppm nitrates. 2 more angles and 1 of my rainbow sharks died today I check their corpse to see if I seen anything in the hills or on their body but seen nothing. None of my other fish seem to be at the top of the tank or showing any signs of sickness except my 2 remaining anglefish which are just at the surface of the water also my pleco which usually stays pretty calm and eating away algae, has been swimming up and down the glass alot. Please help.
