I assume that works out okay for you? I have heard from most sources that the reservoir needs to be at least 6 inches above the highest tub to get enough flow from just gravity.

Also, I am getting tired of bottles, so I may hurry up my plans for a reservoir system on our current 6 cement tub rack. What size reservoir would you all reccomend? Ideas on a max size, minimum size, or a good balance between not having to refill it all the time and not risking massive floods would be awesome.

Thanks,
Austin