Bubble eye goldfish comes in different colors ranging from white, orange, red, calico and even black due to heavy cross-breeding. They should not be confused with another fancy goldfish variety known as the celestial which has a pair of eyes turning upwards. Young bubble eye fish usually looks pretty normal without the sac and as it grows older the bubble eye appearance will start to form and develop by the time it is about 1 year old. At first, it will look something like accumulation of fluids but as it goes on, the sac actually gets bigger and becomes more transparent.
This special type of goldfish should be kept in an aquarium large enough, and those without strong current generated by undergravel filter system or power filters. They are best housed in a tank whereby the water is calm, preferably without sharp object or any aquarium decoration that might cause injury to their eyes. Due to their delicate requirement your bubble eye goldfish should not be mixed with any other fish species, except their own kind because they will have hard time competing for foods and their eye sac will often become the target of nipping behavior exhibited by certain species especially tiger barb, swordtails and guppy.
If for any reason the eye sac becomes injured or punctured due to accidents, usually a treatment of Melafix will help but try to avoid adding any other chemicals or even salt which I believe can make things become even worse. The best solution to deal with this problem is actually to leave the eye sac to grow and heal by itself, and during this period try to ensure that the water is clean and crystal clear so that there won’t be any chance for infection to take place that will further aggravate the injury. Depending on how serious the wound is, somehow it will take anywhere between 2 weeks or so before it gets better.
Bubble eyes goldfish nowadays are rarely sold in aquarium pet stores. Somehow due to their extreme and delicate needs, fish suppliers seem to avoid buying them and offer the fish for sale. Main reason is because if they are placed in a general tank, the owner will often overlook on certain matter and this usually results with the fish having high mortality rate and it is very normal to see them die when being neglected. Buying online is even more difficult because sellers usually will have a hard time to ensure that they will survive the trip and thus your best bet should be, if you ever come across fish farms, I would suggest you just grab the goldfish as your prized specimen.
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