Poly Tanks for Sale Leave a Comment / news / By info@foreseestudios.com Poly Tanks for Sale! $200 each or $350 if you purchase both 335 gallon poly tanks. Cash only. 2-400 gallon tanks (SOLD) 2-335 gallon tanks 1-325 gallon tank (SOLD) Message or call us at 507-359-8900 if interested!