If you have not got a regulator like me try three party balloon tanks in one exit bag the flow will be fast you need 8 minuters of flow and with three tanks should be enough. the hardest thing helium exit is concerting the tubein to the tanks takes time and make sure your the exit bag is sucure over head with more than elastic use tape. That’s my way Im not sure but it should work.
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If you have not got a regulator like me try three party balloon tanks in one exit bag the flow will be fast you need 8 minuters of flow and with three tanks should be enough. the hardest thing helium exit is concerting the tubein to the tanks takes time and make sure your the exit bag is sucure over head with more than elastic use tape. That’s my way Im not sure but it should work.