i simply drilled a hole in the bottle cap of the bottle containing the mash, and ran some aquarium tubing from the bottle cap to a a glass of water. If it doesn't fit snugly then you can always use silicone glue or hot glue er what ever can create an airtight seal. If your parents are overbearing (like mine) Get creative
Be careful when fermenting fruits as the pectin it contains will be converted by the yeast into methanol. (when methanol is metabolized within the liver it is broken down into formaldehyde which is detrimental to nerves, specifically optic nerves.)
An easy solution to this is not to ferment fruit or to distill the shit out. Albeit a little methanol wont hurt but too little of a bad thing will never hurt.

What i do to determine the maximum amount of sugar i can use in my fermentation batch is i go to
Home Distillation of Alcohol
go to preparing wash
there will be a drop down option to sugar based
move cursor over it, and click on max sugar concentration