Upgrading to larger tank

[RABENA]

20 to 40
Easy way to do it less trauma to the fish

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[RABENA]

20g to 40g hints and short cuts PLEASE

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[PassengerTN]

First a few questions

Are you using new substrate?
Are you using a new filter?

 

[RABENA]

No and no
Substrate just 1 or 2 new bags river rock med size.
Filters go right on new tank
Water as much as old into new tank

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[RABENA]

Sorry pic upside down

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[RABENA]

Thinking about a 10g water change today
That would be my first 10 g in the new tank
Then empty 20 into next
Then add remaining 10 through out the day

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[PassengerTN]

Is your current filter capable of filtering a 40g?

Heres how I would do it. Not saying its the best however.

Take all fish and place them into bucket(s) of tank water.
Put an inch or so of water in new tank
Get a NEW dustpan or other item to scoop existing substrate up and place into new tank, mixed with the new to cover the additional surface area. The water you added before the substrate is to keep it wet so beneficial bacteria stays good
SLOWLY fill the tank to prevent as much clouding as possible
Add decor
Add filter
Add fish
Go about your day

You should keep a watchful eye over it for the next few days/week though. It may experience a mini cycle and you'll need to do the necessary steps in order to keep that in check