Hello Everyone,
I push the limits to the extreme in my one of my 200 gallon fish only tanks with around 25-30 large 8-12 inch fish. I have so much biological filtration (fluidized sand bed filter) that I never have any ammonia or nitrite spikes. I have extremely healthy and vibrant fish (listed in my signature) but I have mysterious deaths of large angelfish and tangs sometimes that are so surprising. The fish are disease free, eat extremely well and are fat as can be, swimming and behavior is optimal...but out of no where they die. I have very high nitrates 80-150ppm and was wondering if this causes some fish to die somehow. I lost a beautiful Annularis Angelfish that was doing so well for 2 years and suddenly died with no signs of problems. Have never lost any triggers, puffers, rabbit fish, or anything other than tangs and angels. What do you guys think?
1) 2 weeks no water changes - 150-200ppm
2) Weekly water change 30% - 60-75ppm right after a change
2) Weekly water changes at 2-30% changes two days apart - 30-40ppm
What should I do, I know I am not going to stock lightly or get rid of my babies but I want to not loose my precious angels.
I push the limits to the extreme in my one of my 200 gallon fish only tanks with around 25-30 large 8-12 inch fish. I have so much biological filtration (fluidized sand bed filter) that I never have any ammonia or nitrite spikes. I have extremely healthy and vibrant fish (listed in my signature) but I have mysterious deaths of large angelfish and tangs sometimes that are so surprising. The fish are disease free, eat extremely well and are fat as can be, swimming and behavior is optimal...but out of no where they die. I have very high nitrates 80-150ppm and was wondering if this causes some fish to die somehow. I lost a beautiful Annularis Angelfish that was doing so well for 2 years and suddenly died with no signs of problems. Have never lost any triggers, puffers, rabbit fish, or anything other than tangs and angels. What do you guys think?
1) 2 weeks no water changes - 150-200ppm
2) Weekly water change 30% - 60-75ppm right after a change
2) Weekly water changes at 2-30% changes two days apart - 30-40ppm
What should I do, I know I am not going to stock lightly or get rid of my babies but I want to not loose my precious angels.