It is better to have them in square pots but i have seen quite a few grows where they used net cups
If you are getting a 4 by 4 tray and already have a rez all you would need is a water pump $25-30, fill and drain kit $10, and some tubing to attach to the fill and drain fittings. It would make it so much easier on you man, just mix up nutes once every week or two and let the timer and water pump control their watering

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Actually I have the drain kits and pumps but no res big enough I am still mixing daily in a 5gal. The 4x4's were about $145 each and I am gonna shop the local farm store to see what a res will cost me. I had just bought a controller to run my co2 and fans and such today so that was $200 and the pump was $25 I think. I will have to count my pennies and see if 2 trays are in my future. And I have plenty of timers.

How much res do I need for 2- 4'x4' trays?

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Multi Strain Coco Grow
Ganesha's Dream Grow
Flowering Room Update

I think it is a general rule of thumb for your rez to hold twice as much water as you table does
I would use a different res for each res so that you can do multiple strains and not worry about having to compensate for different strains on the same table

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I am doing starting a germination test on my Ganesha's Dream BX1. Thirty seeds scuffed in a film canister lined with sandpaper, now soaking in same with warm water and 1 drop of H & G Root Accelerator.

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Multi Strain Coco Grow
Ganesha's Dream Grow
Flowering Room Update

Hmmmm, I am gonna have to make a lot of room for 2 80 gal rez.

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Multi Strain Coco Grow
Ganesha's Dream Grow
Flowering Room Update

I'm sure you could probably get away with a smaller one it will just mean you have to mix up new nutes more often

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http://www.rubbermaidforless.com/rub..._info-149.html

Check out that stock tank, the user GypsyBush swears by them
It is a 70 gallon tank, 40.5" long, 32" wide, and 24" tall

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Yea those are very heavy duty. I have used them to water sock before oddly enough.

I am going to have to pick one that fits under the tray for sure though. I can of course make the legs taller but I don't want to get to tall and lose the height I am gaining.

I had just bought a 1/4 hp sump pump yesterday that can handle both trays at once. I will talk to the local shop owner who runs a a 4x8 tray and see what he is using for a rez. He is the cheapest grower I know, which can't be good for business cause he is always going "you don't need that".

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Multi Strain Coco Grow
Ganesha's Dream Grow
Flowering Room Update

A quick update, I am still all in veg. I hope to get something moved around to flower this weekend. Man I hope I never screw the pooch like that again. I am gonna be out before it is ready!

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Multi Strain Coco Grow
Ganesha's Dream Grow
Flowering Room Update

OK the grow looks nothing like that anymore.
I added to 4x4 tables and am trying to do ebb and flow with GH in coco. Only one table is fully populated and the veg tent is bulging with at least 100 more cuts waiting their turn. I got a cut from everything but the Sannie's Jack as they still don't have any lateral shoots.

The other strain I have in there that I forgot on my first post is Floja by the Potpimp himself. I have some Cardiac Arrest and Knights Templar on the way as well. I have huge plans for breeding with KT.

Here is a shot of the 4x4 that is going into flower today.

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Multi Strain Coco Grow
Ganesha's Dream Grow
Flowering Room Update