You don't need Antari brand fluid. All fog/haze machines will tell you to use their brand of fluid. The truth is if you buy a good quality fluid thats been filtered, it will work just fine.
In the case of your machine you want water based fluid. I get my fluid from http://www.froggysfog.com. They make very good fluid and have both fast dissipating and a "haze" fluid that will stay in the air a little longer.
You will notice that the manual for the X-310 says to use Antari FLG fluid, DO NOT use this fluid as it is very thick and will hang in the air.
One last thing, I would not go with the fast dissipating fluid for a haze application. You will have to run your machine non stop the entire time and will use up fluid in no time. This stuff is made more for low lying foggers so the fog will dissipate as soon as you turn it off. If you go with haze fluid from froggys it will dissipate in 30 min or so if you have air moving.
New Life Ministries