For a small omega tank, Is a G5/8 Din the same as a 300 Din? I'm looking at this one on Amazon. https://www.amazon.com/dp/B086D9FXBK/?coliid=I3FJNOAR84P4X9&colid=2EFQAM3KVL0BB&psc=1&ref_=list_c_wl_lv_ov_lig_dp_it