Help next to fantail goldfish ?

Hi...I have a couple of questions I was hoping you could sustain with. I had 3 fantail goldfish and one small regular goldfish(which I added to the tank approximately a month and a half ago.)First I began to notice a bloating contained by the small goldfish . It began to swell really bad on it's right side. I took a pic and took it to the local pet store and they said it could be overfeeding or intestinal parasites. So I took the small fish out to another container and gave it some peas. Then I followed up for a few days with medicated food. The fish never recovered. I had the three fantails for over 2 years. I woke up to find the calico(fantail) motionless a few days ago. Nothing visibly wrong with the fish. I have a 29 gallon tank . I not long noticed some "shiny spots" , a few on the 2 remaining fish. I had never seen ick up to that time . I wasn't sure ,but I got some ick guard. I have be treating for 3 days now. 25% water changes every 24 hours . I still see a few spots on the long and flowing tainfins. How long will it cart to kill the ick ? I have read so much on here. My head is foundation to swim . What about the Water temp ? Everyone seems to have a different view about that. Currently it is set to 78. I have tested the water. Nitrates , PH harmonize, amonia levels are all fine. Until today the fish be still being regular goldfish (wanting to eat all the time) Today they own been clinging towards the surface of the tank and not eating . Any proposal would be greatly appreciated. I really don't wanna lose the two remaining fish .
Answers:    man, my friends make fun of me for being so concerned about my fishes
but when you transport care of something, you just start caring for it so much
My fish of 3 years died on nov. 4 and it be bent over
and i was really sad
the remaining goldfish was doing EXACTLY what yours is doing right presently except clinging to the bottom
she ws doing this last thursday
i found her at the bottom unresponsive unless i moved the tank

I thought it be ammonia poisoning but sum1 told me it was Ich.
For my betta I bought Jungle Fungus Treatment
and I put in less than a dosage for my goldfish because she wouldn't even get through and she was the most active! She was breathing brawny and it was in patterns...small breaths after a big puff then small breaths etc

I left her alone but left her in close proximity my lamp light
I put the jungle treater in near (it treats ich)
I didnt put food in for 2 1/2 days
Just saturday she started swimming and eating
I still don't know what it was
but her scales be shiny

maybe it was slime or whatever

I propose you don't feed them if they don't eat (but nurture them after 2 days...just a tad)
if they aren't fighting, don't move them
it add stress

with the jungle treatment
its every 4 days 25% water change
i followed it
and on the fourth daytime she was swimming
so maybe you could try what I did. The ick must have spread to the inside of the body.

Good luck.

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