Hi guys....i have 14 gallon freshwater tank with 2thai gurami 3 platy and 9 neon tetras....
its juts 3days since i had set up the tank.....
As many of my fish died...and remaining with what i mentioned above.
I heard that i should some salt in the water while i am doing 20%water change. i did and found that now my fishes are fine and doing good....
I dint understand y do we need to add salt and for how long

? can ne one pls suggest...
Also advice whether i should keep any snails inside the water or not...read that they clean the waste inside the tank...i am aware that they multiply very fast but what if i keep only 1-2 will it be ok..

what is the right time to put them inside the tank

?
i see lost of my fish waste lying on the gravel should i clean it or shall i leave it for the bracterias to grow

?