Hi there, Around a month ago one of my pond goldfish had what I self diagnosed as a severe case of Swim Bladder Infection.
I set up a 50-60 litre in the house to try and fix him and this weekend I felt I could discharge him with a clean bill of health.
Trouble is, in the month he's been inside, the outside temperature has dropped quite a bit. I took readings at the weekend and his tank is currently at about 20 degrees whilst the pond is at about 8.5 degrees.
Is it safe to return him to the pond with such a vast temperature difference?
I'm beginning to sense he's not really happy in the tank (which is not really big enough for him to live in permanently) but don't want to shock him by putting him back in the pond.
I say pond.. It's one of those 500 litre Affinity Ponds..
It's a bit late in the year to put him back out now......not sure what to suggest really as he probably won't be too happy in the small tank until spring, but if it was me I'd probably not risk putting him back out now. Since he's just recovered from an infection as well I think it's too risky and he's better off grumpy in the small tank until the weather warms up again next year.
EDIT: A better compromise would be to get a big plastic storage box (a food safe one with the fork and spoon symbol) and put him in that 'til spring. You can get quite big ones, up to about 100 litres and may find you can get one that's shallower, but longer than the tank to give him more room to move. Put the filter from the small tank in there to keep the water safe.
Food safe so fish safe and certainly Suey used one of these as an emergency tank for quite a while before he common was transferred to a pond. I use them for emergency and QT's.
Just add a bit of d?cor/plants etc to make fishy feel as home and have some cover. Floating Elodea and Hornwort is fab for that. Doesn't need to be planted and the crates are much cheaper than tanks (you can use them afterwards too for storage!).
Edit: She beat me to it again on the crate front, lol
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