whats wrong with my goldie?

Apr 10, 2005
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Vancouver Island BC Canada
#1
I have a lion head oranda....

He's started acting up today/yesturday, this being 5 days after his Oranda friend Annie died after eating a large guppy (who was accidentily put in the tank).

Water parameters in this tank are fine, checked last night and this morning. The fish didn't eat any breakfast, and was just lying in the bottom of the tank barely moving next to an onion plant. He swam a bit, his belly looks huge, and his eyes look like they have a white film just underneath them.

What would you suggest?

I also have a Pl*co in the tank... is it safe to treat with the pl*co in the tank? do I have to be careful? Can I salt the tank?