Please can someone advise.. I have male and female betta fish that i have been battling to save- (I believe white spot) I was advised to get a treatment containing formalin and malachite green but all that was available the time was an anti white spot treatment containing formaldehyde and malachite green..I was advised to add aquarium salt also.. i have done the second dose of treatment, I saw the pH was off which I rectified and kh remains 0, I have one fish who is very poorly lying on bottom if the tank but trying to fight to get well I can see- what else can I do to help him.. and now I been told that Salt changes your pH and stops the fishes bodily functions from working properly so should not have added it..it this right and if so what should I do to remove it..