I just got a pet Frt about 3-4 years of age a week ago from a local pet store. He/she is in a 180gal tank with 2 (100gal) fluval filters, and is extremely active. I noticed that the white specs on the top of its shell came off earlier today and have been researching that its a fungal infection!?? I've read many different solutions for this problem but is there anyone with a similar situation that was able to cure their frt? I don't know the ph of the water but the temp is 81(deg)F, i have partial fine/ corse sand substrate, the water is not to clean at the moment but I've noticed them even while the water was extremely clean. If I do need to add marine salt to the water how much do I put in? I REALLY need some answers because I don't want my baby to die...... 
