Funny, I just replied something similar a second ago.

Anyway. For super fast grow rates try a constant drip irrigation system with a fast draining medium. Mix your Hydro solution a bit weak at first then gradually raise the TDS over the course of a few weeks. Keep a vigilant eye out for Pesky pH problems, Troublesome temperature extremes, and out of control total dissolved solids. Oh yeah, using water with nuetral pH and 0 TDS to mix your hydroponic...uh..mixes to is a freaking huge help.
As far as a pepper variety.. you got me there. I like to grow cayenne and Jalepenos personally.
Ryan

Thanks for your reply, I've been testing some different kinds of peppers lately, and the one to like it best is actually the cayenne. I've had no luck with my Ring of fire and my Scotch bonnets.
The cayenne started growing furiosly when I got the right stuff and managed to correct the pH to 5.8-6. It responded really well, it's grown 20 cm in the last 1,5 week.
That's one plant I will try again.

I was growing cayenne peppers in a simple drain pipe system using large 32 oz foam cups sitting in holes cut into the pipe. The plants were in a mix of perlite and vermiculite. The cups were cut on the bottom to allow the nutrients to be sucked up into the cups as the nutrient mix flowed by. the pump was connected to a float switch in a tank that was positioned to catch the run-off. Cost is low. The flexible 4 inch irrigation pipe costs less than $5 per 10 foot length. chuck

Here is a link that might be useful: pipe system

is the goal to grow a giant pepper, or to grow a plant with lots of peppers?

if you want to grow a giant pepper tree in a five gallon bubbling bucket, go for any of the capsicum baccatum variaties. peppers with aji in the name are usually c. baccatum. lemon drop is an easy to grow variety that grows a large plant with lots of pods.

for sheer amount of peppers, one of the ornamental varieties will make hundreds and hundreds of little firecrackers. thai hot ornamental is a small plant with lots of pods.

I just want lots of peppers :P
I have bought some Hot lemon seeds, are those about the same as lemon drop?
Also got some Thai dragon seeds, those are said to be very prolific.
Thanks for the tips!
Will set up a little bigger bubbler farm when I get my new apartment.

hot lemon and lemon drop are the same. they grow a giant plant.

thai dragon not as large, but still pretty big for an indoor plant.

the annuums and baccatums tend to either be a shrub or an upright plant, while the capsicum chinense varieties tend to sprawl.

of course you could prune and train the plant to do anything you wanted it to. peppers take just fine to training and/or pruning.