The ATL tanks are about the best But Pricey but ATL By Tims thinking and tank system is a great Idea and very reasonable and Very Proven!!

I have built Composite tanks bow tanks (gas) for a line of boats we were doing a long time ago and they are still going Fine.after years of hammering in a Mono Hull

Overseas We tried using some different explosion suppressants the open cell foam and the Italians have an aluminum system The thinking at the time was the metal ribbon balls would offer a more permanent system but it crumbles and it was showing up in the filters.

Or you can just do this:

Then cap it:

We have been having ATL make custom bladders for our aircraft for a while. Since their lead time and price keep going the wrong way, I just ordered some from Fuel Safe ... for 1/4 the price per unit including the upcharge for 5 day delivery. Talking with Fuel Safe they have several bladder materials, one of which does "outgas" fumes some, and the other which we ordered which does not. I'll know how the Fuel Sage bladders work out this time next week.

-Greg