Hey ya'll in need of some help.

I have six buckets that i was using for dwc. Each bucket had air stone and air pump. Now i was wondering i want to hook all my buckets to a resivour where my nutrients and water are being stored. So that it goes to all the buckets so i dont have to top each bucket off. How would i do this? And then if i do this how would i stop the buckets from taking to much water and over flowing

No easy answer there! You need a pump that sucks too. You need a system like this.

http://www.hidhut.com/general-hydroponics-texas-controller-p-2144.html

Are you looking for a cheap way to top off your buckets or a RDWC system?

Well, i wanted it to be an rdwc, what were you thinking of by the cheap top off?

I am a true Nube, but look up Dutch buckets.
Based on the equipment you described I would do a hybrid DWC with a Dutch bucket drain and reservoir system.
just check YouTube.
peace,
Dogenzengi

If you just want a way to keep your buckets topped off here's what I'd do. Raise your buckets(water level) higher than your res. Hook up a pump that runs to all of your buckets from your res. Use those ebb and flow fittings with the rubber seal and position them at the bottom of your buckets. Somewhere in there before the first bucket put 1 or 2 check valves so your buckets can't drain back into your res when the pump is off. Then I'd drill an overflow hole, where you want the water to stay, in each of your buckets and plum them together using PVC or tubing. Your overflows would feed back into your res through gravity which is why your buckets would need to be higher. Set a timer to whatever you want and let the pump replenish your buckets everyday or whenever. RDWC usually requires a chiller because you have a pump constantly running so your res gets hot. The way I described would still need air stones in each bucket though but if your pump crapped out you would be ok for a while. Good luck to ya.

If you decide to give it a try you need to make sure your pump doesn't overrun your overflow lines. I would think short and frequent fillings like once an hour for 15 minutes would be better than once a day. The more you circulate the less PH and PPM swings you should see in your res. Not %100 sure if this would work but I don't see why not.

heres a great write up on how to make your own rdwc: https://www.icmag.com/ic/showthread.php?t=26343