New to RODI

[gregzz4]

I'm finally making water with a 100gpd RODI unit
I flushed the pre-filters for about 20 mins, then flushed the RO for another 20 mins. It took forever to fill the DI
The TDS today is only 8ppm going in and 0ppm coming out of the RO, so I'm not wasting the DI. I have a 45g drum. There are no Chloramines in our water here.
My questions are;
-do I need a powerhead in the storage tank
-is there any point in a heater for the storage tank as it's in a heated room
-is 50/50 waste/clean water OK for the RO membrane
Any tips would be great thanks