Problem with Ich/Medication?

Question

I keep a 10 gallon tank with 4 guppies, 3 females and 1 male, 4 neon tetras and 2 black tetras. I recently noticed a problem with what appears to be ich, some of the fish have small white spots predominantly on their fins but some on their bodies aswell and some were thrashing their bodies off the gravel. I began dosing for this using Interpet Aquarium Treatment #6. I then began noticing some of the fish had become darkened around the body and mouth as if by ammonia burning. Having tested my water levels and finding them ok I don't know what's causing this. Also 1 of the female guppies appears to be heavily pregnant and her spine has become curved towards the end of her body, is this natural in the latter stages of pregnancy or is it a broken back from thrashing off the bottom? Any help would be greatly appreciated.

It doesn't actually list the active ingredients on the box, which was my problem also. However, the liquid is blue contains Formaldehyde and Methanol though I know these aren't the active ingredients. It is also harmful to Mormyrids if that's any use.

Since I said I suspected an ammonia spike, it must follow that I rationally tested for Ammonia? Your tone's condescending. I did also test Nitrates, Nitrites and pH since I do have a clue.

Answer 1

It's very difficult to know the answers without knowing the active ingredients of the product, I am looking for that info on the web, but if your bottle lists them, please add that to your question. If I find the active ingredients or if you can post them I'll revise my answer.

The bending you are seeing in your guppy has been observed in other very pregnant guppies. I'm not sure I would call it normal or even that common, but it does happen.

MM

Answer 2

You said your water quality was fine and that you had it tested, but you didn't say what you had it tested for. You also didn't say what levels the tests indicated. I have been told numerous times by customers that their water was fine and recently tested, only to find that the nitries are through the roof and the only test done was pH. Ich is caused by stress, and something is causing the stress. Did you test for pH, Ammonia, Nitrite, and Nitrate? If you didn't test all 4, then you are going to be just guessing. Fix the problem and the ich will go away. Also you can try slowly adding some aquarium salt and increasing the temperature to about 83 degrees. I have cured many cases of ich that were caused by poor shipping, just by using clean water, salt, and heat.