Da Kine wrote:
I'm in the Miami area and need to make a tank for under a v-berth.
Does anyone know of a place
that makes tanks for less then $300?

Go to metal fab place that supplies the restaurant business.
I had one 25 gal and one 45 gal water tank fabricated. Using 316L SS.
Restaurants are very cost conscious and want their stuff to look good
too. Do not go to a marine welder. You'll get ripped off.

Do not forget the baffles and other "proper" tank stuff.

I once worked at an experimental oyster hatchery that also conducted
bioassays to determine the suitability of different materials for use
in hatchery and sensitive water systems. Oysters are very sensitive
creatures when developing and therefore made excellent indicators.

Aluminum...............? uggg, heavy metals mean Alzheimer city

Polyester fiberglass takes a long time to leach out the bad stuff. But
will wash clean after a few months of continuous flushing. Even many
FDA plastics approved for potable water systems is a bit toxic for
oysters. Copper is instant death to oysters.

Take a hint from our bivalve mollusk
buddies.............................USE 316L

Or if you're really cheep...................... get lots of 2L bottles.
very storable, cheep, versital, and extreamily safe becsue your water
supply is "compartmentalized" into 2L containers not a single 45 gallon
tank.
Aquatic Bob