How To Keep My Fermenting Beer Cool?

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Guys, not sure if anyone is going to this post, but I too live in brissy but was wondering if you can use this swamp method with the plastic fermenters with tap at the bottom, will this be problem, ie water won't get in?

If water is going to get in the tap, beer would also get out and you would be fermenting thin air..... It's a seal unless your tap is leaking beer out.

One thing to using the 'tub o water' method is make sure to pour some bleach in the water to fend off nasties making sweet love in the water for weeks on end. This way the water is sterile and by design so is the tap when it comes out of the tub o water. I used this method for a year until recently use a 90 dollar bar fridge and a 21 dollar stc-1000 temp gizmo. Very happy now. Gold coast sucks for brewing with no fridge. It can be done however the beer suffered for it.