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 Oranda buoyancy issues Subject: Oranda buoyancy issuesby maccy_g on 8/10/2014 12:11:57I know a plethora of information has already been written about fancy goldfish and issues with swimbladder disorder but I thought I'd ask people's thoughts on this particular issue.I have a 600l tank with 6 Oranda's, 1 Ranchu and 1 Lionhead - they are all healthy and swimming about happily however my black oranda has some buoyancy issues which I believe is food-related.I used to feed the fish a combination of Hikari sinking pellet, frozen food & peas (on varying days, not in 1 sitting), feeding once in the morning and once in the evening.I have owned the black oranda since April but over the past couple of months he has displayed problems with his swimming, in particular when he is feeding from the gravel his back-end lifts up to the point where it tips him over and he has to barrel-roll to "right himself" - his swimming overall is poor and he often appears to struggle whereas the others swim with relative grace (well as much as fancies can bearing in mind they aren't strong swimmers).Around a month ago I withheld food for 4 days and this seemed to solve the problem, after this I fed the fish peas and he appeared to be ok.I have also stopped feed Hikari and replaced this with Repashy Soilent Green, a gel food which is meant to be much better for fancies when it comes to SBD as I hear some fish can react badly to Hikari food.But, over the past couple of weeks his buoyancy issues have come back, he isn't stuck at the bottom or at the top but he is definitely struggling with his swimming again.I am currently feeding once in the morning and once in the evening, any suggestions as to how I can alleviate this issue for him? None of the other fish in the tank have ever displayed any SBD issues.PH - 7.2 (I use crushed coral to raise the ph as I am in a softwater area)Nitrate - 0Nitrite - 0Ammonia - 0I do weekly water changes of 50%