Thanks Armadillo & Cobettacouple for your response!
Its a 25 gl new tank and I've had if for 2 weeks I guess. These are the fishes I currently Have in it:
A
betta, 5 Gold Fish, 1 Kisser, 3 Small Angels, 5 Catfish, An Iridescent Shark (Big One), A Loach, 4 White Shark (Thats what I call Them)..
Fishes at Died in last couple of days : 3 Loaches, An Iridescent Shark (Big One), 5 Gold Fish Including a pair of Shubunkin, One Small White Shark, Two Angel Fish, One Kissing Gourami, One Big Pleco.... thats all i can remember.
I've managed to transfer couple of angels, a pair of Black Widow, a pair of guppy and Two Pair of Gold Fish to my 50 gl new tank. Thankfully they are fine till now.
My 25 gl tank's temperature is 82 F. I've been using Super Ich and Aqua Fungus (Not Quite Sure of the Name. The Pet Store Salesman gave it to me for Treating Fungus. Its made in Thailand)
Since I have been using the medicene, I don't prefer touching the water for cleaning purpose, however I've vaccumed the substrate once two days back but not so thoroughly as i don't want to stress the fishes. Besides, I don't want to touch the water as it has malachite green in it.
Yes I did add a decoration (Artificial Plant) that i bought from the pet store but my fishes were dying before than that.
As far as nitrate, nitrite and ammonia is concerned, i don't have any info. on that because i can't find a
test kit in my locality. I talked to the fish vendor but they say that its not important. They gave me this reason when i asked why its not important:
" We have been into Fish business For Couple of years and we never need a test kit!"