I might go pick up the fishes on saturday.
So I coughed up some illustration earnings and got a new tank, moved everything into it today. Same arrangement and planting. (I wanted a 20 because not out to buy a ton of new equipment right now- and my 50 watt heater was running all the time to keep the 29 at even a low temperature. It won't have to work so hard in a 20 gal). I am going to heat it for the time being- all the adopted fishes will go in here for quarantine before I move the tetras in with the cherry barbs after which this will be an unheated tank.
Very low tech- no heater, no light, just a filter. That's my plan.