I was looking at these but I see problems.
It looks like they get really tall in the middle when full. Also looks like they carrry a lot of height to the edges.
And I'm not sure how they work all bunched up in a parabola instead of on a flat surface like they are designed to be on.
Finally, I'm picturing them breaking my cabin sole
supports as I fill them.
Just not at all sure of these. Need about 40-50 gallons per tank in 2 tanks.
I was looking at building the tanks in as integral tanks but am not entirely sold on the leaching of BPA and amines (if epoxy) or styrene (if polyester).
That basically leaves the NSF guideline meeting polyethylene tanks.
Definitely open to all suggestions including bladder tanks that are more appropriately shaped for the space.