I need drinking water/reef tank RO/DI recomendations. Culligan man just tried to sell me one for over a grand.....am sure I can get one at least as good for a fraction of the price that will suit my needs.

Looking for the entire system, 2 auto shut offs, booster pumps, drinking tank, ect.

GPD recomendations also please. If I recall correct, 75 gpd is most efficiant?