Dwc(5 Gallon Set-up) Reservoir Help!

[EatPizza]

Hello!
I'm about to set up a DWC(4x 5gallon) set-up in a grow tent. I'm looking to have a central resevoir for my set-up. Would another solo 5 gallon bucket, hold enough solution to cater to these 4 buckets, or would I need to jump up to a 10-18 gallon bin?

Thanks buds!

 

[indicabush]

5 gallon bucket to should work fine.

 

[Smokey503ski]

A 5 bucket works.
I would use a 20 gallon res.
Reason is you will have less of a nutrient swing.
The smaller the res, the quicker the nutes get used up. Then deficiencies show up soon after.