Just going to take water out the 2ft tank to go in the other tank. If I take 30% of the water out the tank to fill the smaller one.. if it's not got enough in I will top the 2ft tank back up and leave it a few days then take some more out.
Also going to put the small filter from the 2ft tank in the small tank while the new filter goes in the 2ft tank to mature a bit before swapping them back over.

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