Two of my males guppies became colourless. :x It was fine yesterday and the colour was very nice. It wasn't the first time my guppies got decolourise, it died after one day last time. My two feet tank was filled with Neons, rummy nose, swordtail and guppies, all were not aggressive, others were fine, only two of the guppies decolourise. My fish tank was added with anti-chlorine and aquarium salt before all fishes were introduced to the tank, izzit that anti-chlorine or salt should not be introduced to the water? I also have three plants in the tank, will plants affect the fish health?