My fish always seem to get white spots (Ich) or other diseases, why is this happening?
Chances are that new fish you’re introducing had ich or another disease when you bought them from the pet shop. Remember these fish have gone through a ton of shipping and your tank is their latest and last stop. Having to acclimate to so many different water conditions and temperature changes lowers the resistance (immune system) of your fish. Then they get sick easily. If your fish are being attacked by pathogens (bacteria, fungus, worms, etc.) visit our Diseases page, identify the problem and treat accordingly. Don’t forget to check your water chemistry first, to make sure everything is ok here. Black mollies are usually a fish (notorious) that many people get from a department store that develops ich and fungus infections quickly. The reason is that mollies come from brackish (somewhat salty) water. If you do not have enough aquarium salt in your water, their resistance goes down quickly, as the salt diffuses into the water and then they are very prone to get ich and other diseases
