My Angel is ill
Noura,
From what you have said about your tank, the problem is most likely a problem with ammonia and/or nitrite levels in you r tank. As I recall, your tank was already a bit overcrowded when you added more fish last week. You probably should initiate a regimen of 25-50% daily water changes to decrease the levels of these two compounds.
The medication you speak of is probably malachite green, which will not help you at all in this situation. Only reducing the load in your tank and getting the nitrogenous compounds under control will. Knowing exactly what to do, and where you might be in your cycle is impossible to determine without test kits, so we sort of need to go about it the best we can without any measurements. If you can remove some of the fish into another aquarium (and, I recall you said you had no room for another) you would be so much better off. You can try to take some of the healthy looking ones back to the store asking for store credit for them, to be spent at a future time. You may have a friend or two who might like a few fish. One way or another, the population will need to be reduced. Also keep in mind that the angel will eventually need to be housed in at least a 30 gallon tank on its own, or a larger tank if with buddies.
\Steve//
Category: Philippines Internet Koi Society
