Do yall think this sump pump with Venturi eductor is producing enough air bubbles to create DWC conditions?
by wildkarde1300
Do yall think this sump pump with Venturi eductor is producing enough air bubbles to create DWC conditions?
by wildkarde1300
18 Comments
The air intake coming out of the side is smart. How did you do that so that the water doesn’t come out of that hole?
You want the venturi right after the pump and the venturi part underwater with the air breather going out of the tote. You want it at as high of a inlet pressure as you can get relatively speaking. I’ve been using these to mix my reservoirs. [https://www.thingiverse.com/thing:6518143](https://www.thingiverse.com/thing:6518143) they work awesome. Even my PLA ones are holding up pretty well. The downside to a venturi is the constant slurping sound. With the volume of water in a tote it’s surprising how much heat a pump can add. I wouldn’t use one to be my main source of aeration in DWC. If you’re growing in that bucket with it, you’re going to get that pump full of roots and kill it.
Wouldn’t be enough in my grow. I need 2 stones in each 5 gal bucket to keep my roots happy.
Personally I would say no.
I mean it may very well work, but it is less air than I would run in mine.
An 8$ tetra whisper and air stone will easily outperform this and likely even use less electricity.
Venturi pumps are the best. But I wouldn’t use the hose. The less distance you pump the water the better. Mine is regular PVC.
It’s not actually the air bubbles that oxygenate the water, it’s the break in surface water tension.
This can be achieved a few ways but yours looks like it would suffice.
I’d be weary of that pump heating up the water as someone else said.
It is enough, BUT if the roots grow, the oxygen will not be distributed good enough.
Using multiple airstones in the corners will keep it even.
Or use a quick connect t in your line leaving one-sided open
For a reservoir that size? Plenty.
It’s a start . The more air the better is my motto
If I remember correctly, it was 2 liters of air per minute for every 10 liters of water, but it looks like 25-30 liters there. I recommend going generous and aiming for 8-10 liters of air per minute with porous stones. Check that the stones have the number of liters of air they support written on them. Do the math if you use more than one, and avoid porous tubes, which require too much power and don’t make small enough bubbles. The Venturi system is convenient for passive feeding or extra oxygenation.
I have 4 airstones in 20gallons of reservoir and my plants love that soo much that I had to cut down the roots of my plants. Right now I am thinking of cutting down my plants and let the more healthier ones to stay in hydroponics and the ones I remove transplanting them in soil
I use venturis in my rdwc, 2 pots, each have a single venturi on the inflow and I have never had an issue with lack of oxygen.
Both of mine are 1/2″ venturi from a 3/4″ water line on a single 24w 800gph submersible pump.
I normally run coco, is full on hydroponics truly worth it?
Athena says you need 6.5-7.0 kPa as endpoint pressure. More precisely, you need 5-8 mg/l of dissolved oxygen in the solution.
But those are hard to measure. More practically you need an air pump that provides 1l/min for every 4l of solution. Pump specs will tell you the flow rate.
e.g. 4 gal in the bucket, 1 gal/min pump
I’m running rdwc with four large airstones in grow pot (13 gal) my res is also 13 gal with about 23-24 gals total recirculating in system. I’m also using a small chiller, the water temp stays 67 degrees 24/7
https://preview.redd.it/42tst85ro8kf1.jpeg?width=3000&format=pjpg&auto=webp&s=34db0f4b05bf208ce411624956a2cdb4d0e9c2fc
No
Needs more. Might could get away with that, it could be a little rough on juvenile plants roots though.