*deleted. Double post

This post has been edited by Kain_Sicilian: Jun 28 2017, 08:59 AM

Guys, I've been trying to set up a guppy tank for quite some time. After about 6 weeks of trying my guppies are still dying. Water quality so far seems good and I believe my tank is fully cycled. However the guppies keep getting fin rot and one just died. Another four seemed to have something going on with their fins and I am worried. Any suggestions on what I can do? Thanks!!

Btw, I got this dodgy medicine reccomended from the local aquatic store that says "Aquadine: gill fungus parasite special". I have quarantined the four ill looking guppies and added this medication. However I cannot find the active ingredient listed. I am wondering if I should add this medication into my main tank. I am worried that the medication will kill off the bacteria I have in my media.

Thanks again in advance for your kind advice.

May I know how you stopped the bacteria? Thanks!

This post has been edited by Kain_Sicilian: Jun 28 2017, 09:00 AM

Thanks for your kind reply. Yes I did 50% water change for the the past two days. Three more died today. I have some 12 other tetras in the same tank as well. I did not notice any bullying and fin nipping. The remaining 3 guppies seems very active. I am afraid my quarantine tank is not large enough for 3 guppies plus 12 tetras. Also, I am using another spare tank I have to contain my female guppy who seems like she's gonna give birth anytime soon. Maybe it's because I recently bought new fishes? I bought 3 new tetras a couple of days ago and added the to the tank (no water from the LFS added to my tank, just the fishes).

Is there any medication that I can use just in case??