Hi Newbie... For the fish you have, Flaringshutter has already posted the minimum volume you need to keep these fish in good health. I've highlighted these numbers again for you in the text below.
You should also raise the temperature (slowly) to 26 degrees C while continuing treatment, as Flaringshutter also recommended in her post. The higher temperature accelerates the parasite's lifecycle, so you can complete this full cycle of treatment (adults > eggs > larva > free swimmers > adults > eggs > etc...) within a 10-day period.
This treatment has no effect at all on the parasite while it is in its adult form or in the egg/larval stage. The adult organisms will die on their own (naturally) and the eggs released will hatch and grow to a free-swimming stage. It's during this stage that the free-swimmers will be killed... thus, preventing them from reaching adulthood and releasing new eggs.
Without the higher temperature, this parasite lifecycles takes several weeks and the free-swimming form of parasite may not be wiped out completely... making it extremely difficult for your treatment to eradicate all of the parasites.
If it's not possible to upgrade your tank to a large enough size, you should choose between the fish you have now and decide which ones you would like to keep... then rehome the others. Otherwise, all the fish you have will become stunted with weakened immune systems, will develop internal organ/digestional problems, and will most likely begin to die off, one by one.Beyond that, you should know that the tank you have is much, much too small for the number of fish you are keeping in it. Shubunkins require at least 80 litres each, and fantails need about 60 litres each. Your tank is large enough for only one goldfish, maximum. They may be small now, but fantail goldfish can reach lengths of 25 cm, and shubunkins can exceed 40 cm! If goldfish are kept in a tank that is too small, they will become stunted, which can cause serious illness and premature death. So it is important for you to upgrade to a larger tank very soon. If you would like to keep all of your current fish, you will need at least a 375 litre aquarium.
You should also raise the temperature (slowly) to 26 degrees C while continuing treatment, as Flaringshutter also recommended in her post. The higher temperature accelerates the parasite's lifecycle, so you can complete this full cycle of treatment (adults > eggs > larva > free swimmers > adults > eggs > etc...) within a 10-day period.
This treatment has no effect at all on the parasite while it is in its adult form or in the egg/larval stage. The adult organisms will die on their own (naturally) and the eggs released will hatch and grow to a free-swimming stage. It's during this stage that the free-swimmers will be killed... thus, preventing them from reaching adulthood and releasing new eggs.
Without the higher temperature, this parasite lifecycles takes several weeks and the free-swimming form of parasite may not be wiped out completely... making it extremely difficult for your treatment to eradicate all of the parasites.
Last edited: