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I decided to jump straight into the deep end and purchased a keg system about 2 weeks ago but I have a couple of simple questions that i need help with as i dont want to ruin my first brew. I purchased the Morgans Tooheys New Recipe kit and set it going it started plopping along quite nicely. It is now 8 days later and it is still plopping quite aggresively(about 20 seconds apart. The temp is about 18-20 degrees. When will the fermentaion stop so i can keg the beer? The can said 5 days at 23 degrees but like i said this is at 18-20 degrees and it has been going for 8 days.

Patients young Padawan. You might have a bigger lightsaber but the forces run the same way. Test your gravity before you fly.
silk

Lewis, I brew all my ales at 18-20 deg and I usually let them go for 14 days. Depending on how much malt I'm using and what yeast I'm using I get the gravity down to between 1008 and 1012. Hope that helps.

I'm the same Kelp, somewhere between 14 and 21 days depending on how warm it is and how much time I've got. I tend not to check the gavities any more and just leave it several days after the airlock stops bubbling.
Silk

Lewis,
Did you buy a hydrometer as well as a keg system? It's a bit like a lightsabre, but smaller.
That will tell you when your brew is ready. Instructions on how to use it should have been included with your brew kit.

Yeh Silk , just broke my second hydrometer in 2 months so I wasn't gonna worry about taking gravities anymore , you don't really need them once you've been doing it for a while and I can work out what my OG is by what fermentables I'm using . I brew with temperature control [ales 18-20, lagers 12-14] so 14 days is pretty spot on and my FG is always around 1010 .

Yeah i got a hydrometer with my kit but it is reading 1010 as of yesterday i will check to se if there has been any movement overnight. If it helps when i took my sample to measure i noticed small bubbles rising from the beer does that mean it is still fermenting. Like i said im new to this so pardon my ignorance

Lewis , if there is small bubbles that means that there should be movement in your air lock , so no not ready yet.

Two indentical readings over say 48 hours means it's cooked. If you get 1010 again tomorrow you can keg it.
Those bubbles in the test tube are CO2, a product of fermentation but not neccessarily an indicator of continuing fermentation.

Lewis,

Depending on your ingredients and volume (and yeast, to a much lesser extent), 1010 is certainly a possible final gravity.

Undercover is right about the little bubbles in the testing tube. They are just dissolved CO2 coming out of soution. Fill up a glass of tap water and leave it overnight. You'll see a similar thing in that bubbles will form on the inside of the glass.

Make sure you give the hydrometer a spin to get the bubbles off before you take your SG reading. Otherwise you'll get a false high reading.

Oliver

I read the hydrometer this morning it was about 1014 i will give it til Tuesday and test again. Thanks to everyone for thier help although im sure i will be needing it again.