Fire wrote:

I woke up this morning to see the 5 runchus eyes were coder with white layer
over their lens.I immediately do a 100% water change and cleanup the
biofilter.
But condition did not improver very much.
Can anyone pls advise me before is to late.

Just keep doing 24% water changes every day for a week, if you
can get hold of melafix give that a try too.