I got 2 axolotls in october and they've been great, i have had no other problems with them other than stress which was addressed by changing the filter. just yesterday i noticed my black axolotl(neither have names yet) has white fluff on his gills.. i'm just wondering if a salt bath or fridgeration is a good route or not? any advice? i've checked the levels of the tank which read normal, the water temp is 62 degrees he has slowed down a lot especially on eating... i need to get this addressed before it affects his tank mate or gets worse.