Ich

[110innc]

Okay around three months now I lost 1 clown to my filter, another 1 I dont know what happened[no signs of ich or external damage],then a bicolor angel[to ich],and my pearl-scaled butterfly[to ich].

Now I have a yellow & hippo tang and scooter blenny. The yellow tang was introduced 1st and about a week ago the scooter blenny and hippo tang. The tangs fought but now are best friends. Any way they both have ich

a little bit but my cleaner shrimp cleans them both. Do you think ich is still in the tank and the stress caused them to contract it and theyll get over it?
sg 1024
ph 8.2
temp 80
ammonia 0
nitrite 0
nitrate 15-20

 

[sepulatian]

Ich is a parasite and has been in your tank for quite some time. As long as their are hosts (your fish) they will continue to live and breed. What all is in the display? Do you have a quarantine tank?