Reservoir Question

[gst1147]

If a flood and drain table holds 15 gallons filled 2/3 of the way up the containers how many gallons should the reservoir be?

 

[Earl]

Do not have any more in your rez,
than the flood table will hold.


.

 

[gst1147]

I was thinking that if i put more i wouldn't have to top off as much, plus I think that I will need at least an extra gallon in there so the pump doesnt burn.

 

[YaK]

Do not have any more in your rez,
than the flood table will hold.


.

This kind of doesnt make sense. Is the logic so that if the drain were to plug up, that the pump wouldnt overflow the flood table?