Pump Flow

[MickR33]

Hey i have a problem with my setup, i have a main resivor and tgat connects to 2 other tubs, i have a pump in the resivor which has a 19mm hose going to the first tub and then continuing to the second tub which has an elbow pointed down and a short piece of pipe going down into the tub, the first tub has a t piece with a short pipe going down into the tub as well so its like this

res>------|-------------|
t piece -> | elbow -> |

the problem is the pump only gets water flowing into the first tub and doesnt make it to the secong tub, i wanted this so i can circulate water from the resivor to both tubs but its not working how i thought, my thoughts are that it is because the t piece is pointing down so gravity and lack of pressure stops it from making it to the second tub.
What are your thoughts on this and what could i do to fix it, i dont think i would want to have it circulating too fast so that means i wouldnt want more water pressure, maybe if i pointed the t piece upwards and then bend the pipe down?
Please help

[GpsFrontier]

Hello MickR33,
I'm sorry I don't understand what your trying to say. I get that water is only flowing to one tank and not the second, and you mention a "T" and elbow connector, but I just cant picture what your trying to say. I see the picture, but I don't really understand what I'm supposed to be seeing in it. I see a T connector and some tubing, but don't know anything about what's connected to it, how the water is supposed to be flowing through them, what type of system it is, or even how the system is set up.

[MickR33]

yeah i thought it might be hard to understand, i will draw it up and take a photo and try explain it better, thanks for letting me know

[MickR33]

here is a quick drawing

[GpsFrontier]

Ya, I can see how that wouldn't work if you were trying to divide the water flow to both tubs evenly. I have a couple suggestions, but first I want to ask a few questions:

1. What is the lower solid line between the too tubs and reservoir supposed to be? Is that supposed to be a return line?
2. Also are these tubs supposed to have water in them all the time?
3. Is the water level in the reservoir supposed to be the same level as in the tubs? Or is the reservoir actually lower than the two tubs?
4. What kind of system is this supposed to be (a recirculating water culture system, flood and drain system, NFT system etc.)?
5. Do you have an overflow tube to keep the water from overflowing the two tubs?

[MickR33]

Very good questions you have, ok the botton lines between the tubs are 32mm piping that connects them all together so the water level is always the same in each tub and resivor are are even, so the 19mm top tubing is just used to circulate the water to the tubs from the resivor to keep it fresh, and yes there is always water in them. The setup actually has another tub on top of tub 1 and 2 that has rockwool slabs in then and the bottom of those tubs is like a mesh so the roots and water can come out the bottom into the bottom tubs, i have another pump with another 19mm tube running to the top tubs that had little drip tubes feeding the plants.