AGH! My betta keeps getting sick. He's in a 5-gallon tank with great water quality, and a power filter and heater... he has had fungus 3 times now in about a month. Plus, he is still fighting hexamita... yesterday was the last treatment for hexamita, but there is still a small hole. My dillema: Should I do a water change and do a second treatment of hex-a-mit, or put the filter back in for a day and treat the 3rd case of fungus? He has two little strands of white fungus on his back! I am also worried that he will get dropsy from no carbon in the filter. HELP!!!!*SICK* *SICK* *SICK*