I have a 36x16x10 freshwater fish tank that and I am having problems adding new fish. Whenever I add new fish they are dead by the next morning.
The tank has a PH of about 6.8, has no ammonia or nitrites and the nitrate is about 10ppm. The tank tested negative for Copper, the KH was 3 drops for 53 ppm and the general hardness was 6 drops for 107 ppm. I use a fluval 2 plus and a Penguin 125 with a bio wheel. I do partial water changes and also change the filter media regularly. I also use Kordon's water conditioner and Kordon's Rid Metals as well as Tetra's Blackwater Extract. The tank has been running continously for over 20 years.
The fish currently in the tank are 2 Silvertip tetras and 9 cory cats, 6 of which are juveniles that where born in the tank 4 months ago. The adult fish in the tank are nearing four years of age. I have not added any new fish for about two years prior to my problems, I was going to switch to a different set-up and was going to let these fish die off naturally before switching to something different. I have not treated for ick or any other diseases in over 5 years. I did move last year but I'm still on the same city water that I was before and I use the conditioner and rid-metals.
I have tried to add Neon tetras on three separate occasions. I would buy them after work in the evening and by the next morning they are dead. I acclimated the last two batches for over an hour and went to two different fish stores just to make sure they weren't a bad batch. They seem fine when I first put them in and I can't figure out what the problem is. Any ideas on what the problem is?
The tank has a PH of about 6.8, has no ammonia or nitrites and the nitrate is about 10ppm. The tank tested negative for Copper, the KH was 3 drops for 53 ppm and the general hardness was 6 drops for 107 ppm. I use a fluval 2 plus and a Penguin 125 with a bio wheel. I do partial water changes and also change the filter media regularly. I also use Kordon's water conditioner and Kordon's Rid Metals as well as Tetra's Blackwater Extract. The tank has been running continously for over 20 years.
The fish currently in the tank are 2 Silvertip tetras and 9 cory cats, 6 of which are juveniles that where born in the tank 4 months ago. The adult fish in the tank are nearing four years of age. I have not added any new fish for about two years prior to my problems, I was going to switch to a different set-up and was going to let these fish die off naturally before switching to something different. I have not treated for ick or any other diseases in over 5 years. I did move last year but I'm still on the same city water that I was before and I use the conditioner and rid-metals.
I have tried to add Neon tetras on three separate occasions. I would buy them after work in the evening and by the next morning they are dead. I acclimated the last two batches for over an hour and went to two different fish stores just to make sure they weren't a bad batch. They seem fine when I first put them in and I can't figure out what the problem is. Any ideas on what the problem is?
