how many gallons for a 4x4 flood table?

15 gallons should easily cover you. The bigger the res the less maintenance of PH and TDS levels you need to do.

I have a 4x4 table and 30gallon res. isnt enough to fill it up.. THe guy at the store said it was going to fill up the table but he was wrong Now i Gotta get another fuckin res.!! But I wud like to know how many exact gallon to fill it up.

I think its like 40gall. to fill it up.

Also, you need more in the res so the pump doesn't run dry. I have a 3x6 table and it takes most of 50 gallons to flood. Flooding 4 inches.

got math people? Jesus..

area x depth equals volume. 48" x 48" = 2304" x 4" = 9216 cubic inches. Convert to cubic feet 9216 / (12x12x12) = 5.33 cubic feet is the total volume of your table. .13368 cubic feet per gallon thus 5.33/.13368 = 40 gallons. If your filling it with hydroton, the hydroton will take up around 60% of the space. 40 gallons x .40 = 16 gallons. This is the volume of water to completely flood the table.

However... every flood some water will remain. And when in flower my 8 plants will drink 5-8 gallons per day. When they transpire that much your PPM will skyrocket so you want a larger rez to compensate. I would say a 25 gallon rez minimum. You have to remember that your pump won't drain anymore from the rez when the level gets around 2" (depending on your pump). I would go for a 40 gallon in your situation. Just don't fill it all the way during veg. Fill it more when your in flower or you ahve to leave for a couple days.

Here is my 25 gallon rez.. HD extra heavy duty container $12. Love this container. supper tough no flex at all. You could always connect two together with 3/4 hose and grommets.. just attach your circulating pump to one end of one of the hoses. you DO have a circulating pump right....

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This is my 55 gallon rez. Kind of large but it is only around 16" high. The shorter the rez, the more height for your plants. You HAVE TO build a wooden cage like I have or it will completely deform and leak all over the place when filled.

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Nice big rez.. nice big plants.

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hope this was helpfull

Originally Posted by Eharmony420

Thinking about purchasing a 4x4 flood tabel to upgrade from my hd mortar tray. I have wanted one for a while!!!. ANyway. . .
How many gallons do i need to put on the table. I only want to flood a few inches up. I use rockwool. I wondering if the whole table will need like 10 gallons? Just hoping i could use a rubbermaid 25 gallon roughneck as a reservoir. Use a cardtable with a whole drilled in it and the legs chopped as a cheap stand. Fig i could load say 15 gallons in a roughneck safely maybe more, tho dont want to risk it.

i use 2x4 trays and 25 gal res's barley fills them witch sucks because i have to constantly be topping off re ph re tds almost daily its a pain in the ass get a big res its worth having to much than to little believe me and for the stands just throwing it out there i make pvc stands 1/2" or 3/4" buy everything from home depot for like 10 bucks they work great.

[QUOTE=Tee Five;5068669]

Originally Posted by legallyflying

got math people? Jesus..

area x depth equals volume. 48" x 48" = 2304" x 4" = 9216 cubic inches.

LxWxH = Volume, but the above mentioned numbers are correct

so close to being done. 48"x48"x4"x.0043 = 39.62 gallons
So you need a 40 gallon reservoir.