sˌʌm ɐkwˈɛɹiəmz jˈuːs mæɡnˈɛɾɪk dɹˈaɪv pˈʌmps, wˌɪtʃ hæv ɐ mæɡnˈɛɾɪk kˈʌplɪŋ bᵻtwˌiːn ðə mˈoʊɾɚɹ ɔnðə dɹˈaɪ sˈaɪd əvən ɐkwˈɛɹiəm wˈɔːl ænd ðə pɹəpˈɛlɚ ɔːɹ ɪmpˈɛlɚɹ ɪnðə wˈɔːɾɚɹ ɔnðɪ ˈʌðɚ sˈaɪd ʌvðə wˈɔːl.
Some aquariums use magnetic drive pumps, which have a magnetic coupling between the motor on the dry side of an aquarium wall and the propeller or impeller in the water on the other side of the wall.