[Jacob]

Something obvious, just use the uv filter for the new water. I assume there is no problem peat filtering and uv filtering, it doesn’t matter that there’s uv filtration in addition to the peat (for creating proper conditions.)
A wet dry filter seems like a good idea, assuming it really will increase the bioload and make the water more stable. It’s less than 25 gallons and I want about 7 fish, so I need to be careful with the water quaity.
Also maybe the reputation for needing heat comes from the delicateness of the fish and has been accepted as a requirement because other conditions were lacking and needed to be compensated for.
Or the fact that they come from extremely hot stagnant water explains it, I don’t know.