DIY Flood & Drain

Im thinking on doin chemical fertalizers than pure organic tea flush the last two weeks. That would be perfect for flavor and aroma that chem fert wont give u.

If u like my system check out my journal on cheap flood and drain

I have ran organics one time in a flood & drain, and didnt really have problems but had slime and funky smelling water, so I had to add H202 to my water occasionally. I have run DynaGro Products religiously for quite sometime and dont have any of the problems or issues, I dont have to keep my res below 70 degrees and plants thrive and grow well, stable PH and happy all the way through.

As far as the flush, I run a very low ppm my last week leading to harvest that is about it.

Reverof,

Can you post your nute schedule with dynagrow with this system?

Can you post a pic of the top lid with the net pot cutouts?

Is it ok to have a 2" hole for the flood?

How deep is the tray? is it deep enough to have adeqeute space for the roots?

How long do you run your pump timer and how often?

Which pump do you use?

Oceangreen... sorry for such a late reply, I didnt see that anyone posted after my last... anyways here is the answer..

I am very lazy with nutes, I run DynaGro Grow, & Pro-tekt only in the veg table,
7.5ml per gallon Grow & 3ml per gallon protekt. this typically gives me about 750ppm and 5.8-6.1 PH. I never do a water change during veg, I top off with fresh and occasionally add more grow & pro-tekt to keep my ppm between 750-850 throughout veg.

Flowering... 3ml Protekt & 10ml bloom & 2ml MagPro, I do 1 water change about 4 weeks into flowering, usually about week 7 I only top off, and do not add any new nutrients.

I do not run net pots in my flood table, I use Rockwool cubes, typically 6x6x6 for larger plants (4-6 plants per tub) or 4x4x4 for shorter vegged more SOG style, in which I get 10 plants per tray, I can get many more if I want but am happy with yields and veg time when 10 4x4x4 cubes.

size of the flood hole doesnt really matter, but make sure your pump is able to push water through it to the tub, if hole is too large there wont be enough pressure to continue pushing water up. as goes the drain hole, if it is too big and pump is slow, you may never see more than 1/2" of water in the tub.

The concrete mixing tub is roughly 8" deep.

I run my pumps for 15 minutes at a time, and it ranges from 4-6x per day.

I used a CAP pump as I had some laying around...

Hope your still about mate.... Just wondering how big the rockwool cubes you use are?

I use 6x6x6 cubes... I can always be found over at urbangrowing.net register & login and we have a live chat option here, comes in handy.