I'm building one of these for 4 plants. I have gone with the following parts, and it seems to be working ok but not optimal:

Ecoplus 265Gph pump
1/2" Vinyl tube
4) L Fittings
3) T Fittings
4) 360 degree micro spinners

All parts from Home Harvest.

Question for advise, how small of a container can I go with? Is 30 Gallon recommended?

Can I use Vinyl pipe or should I go with PVC?

Should I use more than 4 sprayers?

Is this pump big enough?