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My DIy set up is this...

2 liter bottle with drilled hole, with a barbed fitting, the other end I have a nut screwed on. I used silicon on the outside arond the fitting to stop any fine leaks.

Tubing with a check valve and then tubing goes into tank and then into siphon for my HOB.

Mixture is 2 cups sugar, warm water to neck line on bottle, 2 tsp of yeast and I add dechlor to the mix. Shake it up and put the cap on. I would say withing 1/2 hour I have good bubbles going.

I try to change my bottles out every week to week and half. I have two HOB's and two 2 liter bottles set up this way.

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