Goldfish dying 1 by 1

I think the biggest things for keeping fancy goldfish healthy are HUGE weekly water changes (75-80%) and a ton of filtration.

With goldfish, I don't think anything less than a 75% weekly (if not more often) water change is advisable.

For filtration, if you've got about a 30 gallon tank, two HOB's that can each handle 60g would be my advice and along the lines of what I have in place for our goldfish (in terms of filter rating compared to tank size).

Good luck with your remaining goldies.
 
Thanks everyone for your advice and input with my situation. Mel, I took your advice and fixed the tank although I have only 1 remaining goldfish left with the teeny tiny algae eater. As of today the 2 are doing great thanks to some great advice! Thanks again everyone!
 
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