Since I purchased the Atlantis 2 tank I've been using the 0.3ohms bvcs that aspire sells. Recently I came across bvcs that Morpheus sells that fit the Atlantis 2 and they are 0.2 ohms and the vapor production is allot better, besides that I've been finding their coils for almost $7.00 cheaper than aspires bvcs. So if your looking for better vapor production out of your Atlantis 2 i strongly recommend the Morpheus bvcs at 0.2 ohms .