another helpful gold only zone. One of the best I have seen for golds.
Lice are a hard thing to be rid of, though your fish expiring so fast was prolly the meds/heat. They are hard to get as well, very uncommon for fish not outside.
You must have got something new in the lately and they decapsulated with the sping weather. Yuk!
You have such a nice set up, what a bummer!..total treatment of tank is a must with lice....
I will be the messenger of the bad news..though I know you don't want to hear this and it is mentioned in nearly every new members post and you've been around a while.... that doesn't make it less so...
For goldies: you are way-waay overstocked
.. you should only have an overstock
of no more than 10 there to keep bad things down. And you have 9 fancies and 6 ?unknown assorteds?.....which means you may have the even larger bioload of comets and commons? The bare minimum for golds is 10 gallons per fish! Sure, you can cheat on a gallon or two with bigger tanks or younger fish; but not by much.
And you do not have a sterilizer like some keepers that like stuffed tanks will put in. And over-filtration does not put oxygen back in the water, or electrolytes..golds are big USERS of resources, worse than a mooching relative!
And you have some poor plecos at the bottom of that mess...bleh
With that many, treatment for lice is gonna be a bear! It is HIGHLY contagious and they populate exponentially. The whole tank has to be stripped and sterlized most likely. What a pain to recycle.
You will have to join a goldfish forum somewhere to get a DIY
cure because of how complicated it is. Especially for so many fish in an X amount of gallons. I have onl seen it once on koi and my betta I got for Christmas (His I picked off since he was already by himself and under meds for 4 things..the meds killed him eventually)
; haven't done it in years and I was just a helper at that..so I wouldn't dare try to half remember the steps and post them. The complicated part is the amount of meds.
For most proplems, Golds respond well to just good old copper and salt
..I would take extreme care with other meds and with heat since it can make your golds ill and weak and isn't as good against lice.