Just 3 weeks ago, I started up a new 14 gallon aquarium. I have introduced over that time:
4 Neon Tetras
5 Tiger Barbs
5 Panda Corydoras (Now 1 in a hospital)
1 Sailfin Pleco
4 Clown Loaches
1 Upside down Catfish
1 Electric Yellow Cichlid
2 Male/Female Guppies
1 Java Fern
2 Dwarf Grass
1 Amazon Sword
I was running 2 fifteen gallon filters (A total 0f 30 gallon power) initially. Then about a week ago, I upgraded one of the two to an "Aqua Clear 50 Gallon". I had treated the initial tank water with Aqua Plus. Then weekly with easy balance.
I have experienced no die offs or any ill effects for the first 2 weeks. But during the 3rd week, 2 of my panda cories were acting strange. They were hanging out at the surface breathing. I know that cories can breathe our air if needed, but the tank was well oxygenated to begin with. Knowing that these cories are particularly sensitive to pH change, weekly water changes and application of easy balance were utilized.
Well, a day after the strange acts, one died overnight. The body showed no signs of foul play (No damage from other fish). Or even disease. That when I upgraded one of my filters to the "Aqua Clear 50 Gallon". The next day, the other one died as well, with no signs of damage or disease.
At first, I thought it was the pH, but the water was crystal clear. Also, my tetras; another very sensitive fish showed no such ill effects and continued to thrive daily.
The following day, a third Cory contracted fin rot on the tail fin. He died the very next day as his entire tail fin was devoured to the base. I didn't even have enough time to get any sort of treatment.
Here are some Pictures:
After this third death, I quarantined the last 2 in a hospital tank. On the first 2 days, I treated with Maracyn. But then, on the third day, the fourth Cory contracted what seemed to be fin rot. The dorsal fin was fraying, along with white cotton like material lining the very edge of the fin itself and some scales. I realized that the infection was probably a gram negative, so I completely changed the water and medication. I began to treat with "Furan2" and Melafix. I followed according dosing that began this last Sunday October 4, 2009. All was well these last 2 days Oct 4-5, with daily dosing. The two cories were fine, swimming around periodically. Then just today as I awoke just two hours ago, the infected was dead. He must have passed overnight.
I inspected the body and saw the frayed dorsal fin, as well as a blood streak in the skin near the fin. Between the scales was a minute but noticeable amount of white cottony growth.
He was absolutely fine the night before.
I simply cannot explain these losses. I used to raise oscars, clown loaches, and other fish in ponds. But never had such troubles with diseases. I know that the tiger barbs may have pecked at the corys. And that this would cause fin rot. But that does not explain the rapid death. I mean, the water is crystal clear, being treated by easybalence, receiving 65 gallons of filtering, with ammonia and nitrite not being a problem. I mean my tetras are fine as ever. The water is also adequately oxygenated. I live in Hawaii where the tap water pH is 7.6 on average. Thatís why I treated the water with Aqua Plus. All the other fish are totally fine.
Anyone have an explanation or knows whatís going on?
I do know that I am stretching the limit, but that's why I have over filtration. I do plan to get a larger aquarium in the near future where as the fish become larger, they can be transfered. None of those fish other than the guppies or tetras will remain in this tank for very long. There are no signs whatsoever of stress or agression as I do monitor them often.
I know what I am doing, I have had a 30 gallon for about 8 years that had a full grown oscar, an eight year old 10 inch clown loach, with a med sized bala shark. I again, over filtered the tank. The Oscar is alive to this day (as I gave it away).
I know the max size of all of my fish, and how far I can stretch this tank, therefore will make appropriate accomodations when the time comes.
The Kuhli Loach