I am back after having healthy fish for about 2 months I have a sick one again. My last clown loach has been getting skinnier for about one week and his eyes are slightly cloudy. He is still eating and looks happy and active.
I set up my 55 gal
tank in September and have had 10 out of 18 fish die since then. First it was my zebra danios who got reddish gills then got skinny, lost their appetite and were removed from tank. They also hung at top and seemed luthargic. Some of them got a sort curved body structure.
Then 3 out of 4 clown loaches died. They also got slightly reddish gills. Their lateral line stuck out when they got skinny. They seemed to lose the ability to eat. Occassionally they would eat and spit the food out.
My 2 siamese algae eaters and 6 ottos have been unaffected and do not show any signs of illness.
Attempt to cure:
In January when the 3 clown loaches were sick I treated with anti parasite tabs with no success. I'm not sure if this rules out gill flukes b/c the fish were quite ill before I treated.
My pH has been stable at 7.6. My ammonia levels always zero. GH
I am attempting my first planted tank so my nutrient levels have been unstable causing my plants to stop growing at various times. This may have led
to unstable O2
levels. Since there should be no surface aggitation in a planted tank there was no inlfux of O2
from the atmosphere.
My temperature plummeted 3 times, due to my apartment temperature going down to 40 degrees!
I also was not so great with water changes. I think 3 times since September I changed the water after 2 weeks instead of 1. I usually do about 50% water change.
I feed every other day a rotation of blood worms, flake food, and mosquito larvae.
130 W 6700K
The reason why I really need your help is b/c I have just cleared my tank of plants (b/c they were dying) and if I think that drastic measures are necessary I may might to tear my tank down now and before I get a tank full of new plants and try again.
Why have my 8 algae eaters remained so heathly through this whole ordeal?
What is lurking in my tank?