hey guys, i have a huge tub of water now with some salt in it. i wil be using this saltwater for my new tank. i planned to dissolve it over night by using my new koralia 2 powerhead. so i hook it up plugged it in, and it didn't start at all. my question is, am i supposed to turn a switch or rotate the head of it? i need answers asap, i need this salt to disolve and not sit there.

