We had some zebra Danios (sort of my little girls but I looked after them) that lived happily in a 17 ltr cold tank for 4 years. Decided to get a slightly bigger tank for them so bought an Aqua-start 320T which holds 36 ltrs. Got talked into adding a heater. Set-up new tank, with new and old tank filters running, using a lot of old tank water but fish didn't like the move and sadly we lost them. Probably the shock of moving to warm water after being in cold (well unheated) for so long.
Took water to shop for testing for a couple of weeks before levels were good enough for fish (nitrate levels were too high for a while). Assume that fish hadn't been eating so the end product of the cycle had increased nitrate. Water changes and a couple of weeks later got ok for new fish. We got 2 zebra and 2 leopard danios.
The following weekend we lost the 2 zebras and one leopard. I was testing using strip tests and the levels were okay (ammonia 0 nitrite 0 nitrate less than 10) but I now know that these can sometimes be wrong. I spoke to a fish shop and the only thing he could think of was I hadn't been giving the water enough time to warm up before adding to tank causing the temp to drop too much putting the fish into shock. This hadn't occurred to me as I was used to adding water to an unheated tank and we'd had some cold weather so the water would have been cold.
The remaining leopard lasted another 3 weeks then we woke up one morning to find he had died too. He'd gone off his food a few days before but seemed ok otherwise. I tried to remove any food he didn't eat. Again still testing with strips and everything appeared fine.
Having done some reading online I realised that the test strips may have been giving me false readings so I ordered a master test kit. Took water to a different shop to get tested (this time they used test tubes etc. not strips) and got ok for fish so got 4 more danios (this time 2 golden zebras and 2 pearl).
One pearl did not last the night. The next day my test kit arrived and I tested. Ammonia 0 nitrite 0 and nitrate 5. Two days later we lost the other pearl and one of the golden zebras. I spoke to the shop who said to bring in water for them to test again. I did, they agreed that the levels seemed ok so replaced the fish. That evening we lost the other original golden zebra but for the first time we saw a fish that was struggling to swim and seemed tired. Another 2 days and we lost the replacement golden danio and one pearl. Again tested water, nitrate was up to about 10 so did partial water change. Also tested tap water to ensure that there wasn't an issue with that but levels all okay.
Another day or so later and I noticed that the pearl had white spots on it. Went to fish shop again and got meds for white spot (ich). Did partial water change and gravel vacuum and added meds. 2 days later we woke up to find our last fish had died. The water is still testing okay so either there is something in the water that isn't being tested for (but not sure what as the other fish had the same water for years) or something else is wrong.
Or could the first set of new fish have suffered from being added to a tank that hadn't cycled (but test strips were leading me to believe things were okay) and the second lot were crap fish??
I'm adding the stuff to the water for changes (8 ltrs at a time) so the tap water is safe. I've also been adding Nutrafin Cycle as per directions.
What should I do now? Empty the tank, clean it and start again? Keep the tank going and keep testing? HELP!!!
Took water to shop for testing for a couple of weeks before levels were good enough for fish (nitrate levels were too high for a while). Assume that fish hadn't been eating so the end product of the cycle had increased nitrate. Water changes and a couple of weeks later got ok for new fish. We got 2 zebra and 2 leopard danios.
The following weekend we lost the 2 zebras and one leopard. I was testing using strip tests and the levels were okay (ammonia 0 nitrite 0 nitrate less than 10) but I now know that these can sometimes be wrong. I spoke to a fish shop and the only thing he could think of was I hadn't been giving the water enough time to warm up before adding to tank causing the temp to drop too much putting the fish into shock. This hadn't occurred to me as I was used to adding water to an unheated tank and we'd had some cold weather so the water would have been cold.
The remaining leopard lasted another 3 weeks then we woke up one morning to find he had died too. He'd gone off his food a few days before but seemed ok otherwise. I tried to remove any food he didn't eat. Again still testing with strips and everything appeared fine.
Having done some reading online I realised that the test strips may have been giving me false readings so I ordered a master test kit. Took water to a different shop to get tested (this time they used test tubes etc. not strips) and got ok for fish so got 4 more danios (this time 2 golden zebras and 2 pearl).
One pearl did not last the night. The next day my test kit arrived and I tested. Ammonia 0 nitrite 0 and nitrate 5. Two days later we lost the other pearl and one of the golden zebras. I spoke to the shop who said to bring in water for them to test again. I did, they agreed that the levels seemed ok so replaced the fish. That evening we lost the other original golden zebra but for the first time we saw a fish that was struggling to swim and seemed tired. Another 2 days and we lost the replacement golden danio and one pearl. Again tested water, nitrate was up to about 10 so did partial water change. Also tested tap water to ensure that there wasn't an issue with that but levels all okay.
Another day or so later and I noticed that the pearl had white spots on it. Went to fish shop again and got meds for white spot (ich). Did partial water change and gravel vacuum and added meds. 2 days later we woke up to find our last fish had died. The water is still testing okay so either there is something in the water that isn't being tested for (but not sure what as the other fish had the same water for years) or something else is wrong.
Or could the first set of new fish have suffered from being added to a tank that hadn't cycled (but test strips were leading me to believe things were okay) and the second lot were crap fish??
I'm adding the stuff to the water for changes (8 ltrs at a time) so the tap water is safe. I've also been adding Nutrafin Cycle as per directions.
What should I do now? Empty the tank, clean it and start again? Keep the tank going and keep testing? HELP!!!