DIY Hydro Setup
OK so I have done hydro grows in the past, three times with a store bought system of 6 pots with a pump that fed the nutes 6x a day through spigots in the top the pots that drained into a series of pots below. This was "back in the day" and while this system was OK but I found that the roots could care less about the rockwool and just followed the path of the water to get to the reservior though the drain holes. The last two hydro grows I did were the product of research to design and build a system based on the environment I had available to grow. I went with reservior-based systems the first was NFT and the last was DWC.
I really get so much enjoyment out of building a system from scratch. This is the first hydro grow where I built both the grow box and the hydro system. This has been a learning experience with every step so far with lots more to come I'm sure.
Parts
The short list of parts I have used to build my system were purchased at my local hydro store and over the Internet. The core component of this first phase of the hydro setup is the 1 gal bucket, lid, and 5" airstone seen in the upper right. The buckets and lids were ordered from
US Plastic. The airpump, air stone, blue tubing, and 4 gang air valve to aerify the nutrient solution are from Petsmart.
On the left bottom you can see the 1/2" rubber grommets, T connectors and shut-off valve. Just above that is the 1/2" black tubing to transport the nutrient solution. The tubing and pots are all black to keep light away from the nutrient solution. The middle bottom shows the 2" netpot, Sure To Grow (STG) cube, and 2" neoprene plugs. STG cubes in netpots will be used to host seedlings and clones. The neoprene plugs are used in empty netpots to blank out unused holes in my bubbler lids. Light must be kept out of the buckets at all costs!
DWC (Bubbler) Concepts
The Deep Water Culture or "Bubbler Bucket" creates an environment where the plant roots can survive while emersed 24x7 in the nutrient solution. There are two air pumps connected to a gang valve and then to airstones in the bottom of each bucket. The airstones keep the nutrient solution highly aerified. Enemies of DWC are light, heat, and high concentrations of nutrients. Keep the buckets/reservior as dark and cool as possible. Having a meter to measure EC or PPM is crucial to monitor nutirent levels. Follow the mfg instructions on proper EC/PPM and always start with a weak solution and build the plants up gradually. The plants will only be able to absorb nutrients properly when the nutrient solution PH is between 5.2 and 6.2. A PH test kit is mandatory, a PH meter is very handy.
Inside the Bubbler
Continuity of air is crucial for plant survival. The plants will literally drown if the bubbles stop so two pumps are used to protect against failure. The dual pumps come into each side on the bottom of the valve and there are outputs on top to drive up to 4 bubblers.
Air valves
The lids of the buckets have holes drilled with a 2" hole saw to seat the netpots.
Bubbler System
The system should be designed to minimize the exposure of the nutirent solution to light. The top view shows that the netpots fit snugly in their holes without any gaps. The empty netpots are covered with neoprene plugs to complete the light barrier. The solution needs to be kept cool but the black buckets will absorb heat from the lights. Painting the lids white will help minimize the heat and also reflect light back to the plants.
The first plant went into the bubbler yesterday. Now it is going to get interesting! No nutes in the solution yet. Will likely start with 1/4 strength nutes tomorrow.
The bigger picture concept here is to have multiple bubblers buckets connected together. I will explain later how this will work and eventually integrate a water pump and a 15 gal reservior into the system.