How many fish and what species?
Also are they just going to another room on the same floor? Or going upstairs/downstairs?
If it were me then as it's short term (couple of hours max), I'd find a large plastic container. A bit like a kids toy box...
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Put fish and just enough water in there to keep the filter going if possible (don't know what type of filter you have), and depending on how long it'll take an air pump might be a good idea, set up the heater etc.
Then put the fish to one side, empty the old tank straight into the new one using buckets. (Unless the new one is going where the old one is?)
If it is going where the old one was then it really depends how much water you want to save. If it were me I'd just do lots of partial water changes on the run up to the tank switch. And then basically throw all the old water out which will allow you to move the tank. Once it's moved simply refil the new one, de-chlor, move equipment over (filter + heater), get tank back up to temp (warm water will help) and pop the fish back in.
Edit: Oh just incase it isn't clear, I'm suggesting lots of partial water changes to get the tank water similar to the tap water. This way you can completely refil the tank with tap water and cause no shock to the fish.
Dont think so.
Pretty much trial and error, learning by asking how others have done it, and a bit of common sense.
Some people bag fish up to do a tank transfer, but you can imagine how much hassle transferring say...a fully grown oscar would be in a bag. It would be much easier in a tub. For you it might be easier for you to bag as they are smallish fish? But...unless you're good at catching and bagging it could be far more effort than it's worth when you can go to your local diy shop and buy one of those tubs for like £5.
With the tubs you can set up the heater and filter and air pump etc which is a benefit when you may be taking awhile sorting the tanks out. Bagged fish would be easier to transport to different rooms and up/down stairs, but that's why I asked. Cause the downside to bagged fish is that you can't keep constant temp, ammonia builds up, and overall it's more stressful.
I explained how to avoid stressing the fish....
So I'm confused as to what you're asking?
Why would you need to run it for a few days? Are you not moving the old filter across?
Hi...I've done just what you are doing a few times. All I did was try and get the closest I could to get the same temp. of tap water into the bigger tank,minus the amount in the smaller tank. Add the chlorine remover and I have the liquid bacteria that is added even after a water change.
Don't rinse the filter or anything else,just to keep all the bacteria you can. Then I bag the fish,add the water from the other tank then float the fish for 20 min. Then you're good to go!![]()
Hi...I've done just what you are doing a few times. All I did was try and get the closest I could to get the same temp. of tap water into the bigger tank,minus the amount in the smaller tank. Add the chlorine remover and I have the liquid bacteria that is added even after a water change.
Don't rinse the filter or anything else,just to keep all the bacteria you can. Then I bag the fish,add the water from the other tank then float the fish for 20 min. Then you're good to go!![]()