1 of my mollies keeps coming out in a milky fluffy covering all over body in patches,it appears flakey and also one eye blows up,its come and gone three four times over two months,ive done a few good courses of esha 2000 but like i say comes and goes,i have 4 mollies 2 platies 2 guppys 10 cardinals few fry!,amm.0,nitrite.0,20,ph 7.5 ish,25.c