- 26 Feb 2013
The tank is fully cycled and mature.
I am sure by now you got plenty of advise mate. But the above is the key to keeping animals healthy and alive. I am not trying to be patronize you or anyone. I am coming from similar experience, that's all. .
You can never tell if a tank is fully cycled or mature because it cycles all the time...it's a 24/7 flux. Things go right or bad every day, and we fishkeepers, the setup, the input, is what influences it. A mature tank means you got the right balance of bacteria, non-pathogenic vs pathogenic, enough oxygen, the right food, the right combination of critters, etc... But one has no way of knowing this unless they have the gear to scientifically examine the setup and even then scientists are poor because they have poor knowledge of fish.. The rule is that if critters are doing fine, behaving fine and naturally, growing fine, then you have it right. If not, then the issue issue is related to cycling, ,density of critters,compatibility of critters, enough filtration, too little flow, too little light,too much light, too much food, too little food, wrong type of food, enough water changes, enough oxygen. Fiddling with chemicals does not help whatsoever even if you're a pro.
I always say, if there are issues, start daily 50% water changes religiously. Decrease the bio load on the tank. Increase filtration, although it takes a while for that to take effect, but a big external filter will help to prevent the same in the future. Critters already affected will not make it but the changes create a stable setup for future critters.