15lt big enough for dwc ?

Need a bit off help here,

Was going to use 5 gal buckets but having problem keeping the temps down, i have found a cooler box which holds 15 lt off water would this be big enough for a single . by the way it is going to be a multi bucket / cooler box recirculating system.

The temps are being a problem to keep down at the moment it is very hot outside so need to find a way to control with out having the AC on all the time.

any advice welcome

It should be big enough.

If you can't keep the A/C on then you need a chiller.

im such a dumb arse being a Brit im thinking 5 gal is going to be 25 Lt but most people are talking 5 American gallon so is only 18 Lt. so the size is ok and you are right the only way is going to be cooling the water either with a chiller or keeping the AC on.

thanks the for the input LOC