I have a 36" single strip I'm looking to sell or trade (T8) it has a month-old floramax bulb in it.
I also have a 10-gallon sized T8 single strip (has a reptile bulb and some slight warping from being near a heat-lamp). Not sure if that's what you'd want for a 20 tall or if that'd be for a 20 extra tall.
If you're interested, PM me.