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Thread: Cheap dosing pump!! Reply to Thread
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Topic Review (Newest First)
06-17-2011 10:45 PM
plantbrain I've used a pair on a client tank.

They have been fairly consistent once to tweak them and fiddle with the head height and run them a few times.

Careful with backflow, make sure there is an air gap at the end of line into your tank. Also, run test runs using only water, a good timer and min settings are key.

Timers often cost more than the pump.
06-17-2011 09:51 PM
Booger People have been trying for years, but there's no substitute for a peristaltic pump. I went the more expensive route with a GHL profilux as I wanted some of the extra features, but there are ways to save a few bucks without sacrificing accuracy.

You can put together a quality 2 channel setup for < $200 now. The Bulk Reef Supply peristaltic pumps have a really good reputation in the reefing community. Rig up your own dosing containers, a couple timers, and you are dosing automagically.

Youtube Video Link
06-17-2011 09:22 PM
IWANNAGOFAST yeah, mine did not work out, I had it set up but the volume dispensed changes each day because the water level in the jug dropped. Probably didn't help that I was pumping the fluid like, 4 feet up into the main tank.

These would, I think, work great to dose if you were doing a sump.
06-17-2011 07:45 PM
gagaliya
Quote:
Originally Posted by Tmos540 View Post
Man I have been trying to fin a way to deliver a single milliliter of liquid daily and so far, no luck at cheap prices. Any suggestions?
This is one of those things that trying to save some money by buying cheap will end up costing you more. It's something you will be using for a long time and the quality/precision is very important.

I would bite the bullet and get the bubble magus dosing pump, it's the best $250 i ever spent, you can probably find it even cheaper on [Ebay Link Removed] I have it setup to dose 1ml everyday before the lights come on and it's precise to the dot. You also get 3 dosing pumps in one and this will last you a long time as the only thing that needs replacing is just the tubes (1-2 years).
06-17-2011 06:18 PM
CuLan Tom Barr mentioned IV drip and solenoid.
06-17-2011 02:21 AM
Tmos540 Man I have been trying to fin a way to deliver a single milliliter of liquid daily and so far, no luck at cheap prices. Any suggestions?
12-11-2008 10:04 PM
moogoo from what i've read w/ the 30" limit on these aqualifters, it's ability to PULL liquid is 30" limit, but it can also push the liquid quite well afterward. i ordered one and will be putting it through tests to see how to set it up w/ my new tank setup. i figured it'd be the cheapest, easiest way to autodose and auto top off. i'll have updates in my thread when it's all said and done
08-15-2008 06:19 PM
Wasserpest For macros except P, I like to use a water pump. Compared to the AL, it mixes the solution each time it is dosed, and it is not as dependent on head pressure.

To dose P, I prefer a little test tube full of it, dissolving over time.

For micros, I think peristaltic pumps are the best choice.

That said, the Aqualifters will work just fine.
08-15-2008 05:20 PM
Augus
Quote:
Originally Posted by Wasserpest View Post
There isn't much to it... it works. Do you have a specific question?

I prefer different ways to autodose, but you should try the Aqualifter because it is pretty simple to set up.
Wasserpest, which way you perfer from all DIY?
08-15-2008 04:56 PM
Wasserpest
Quote:
Originally Posted by garuf View Post
Any chance of an update on this? It's something I would really like to try!
There isn't much to it... it works. Do you have a specific question?

I prefer different ways to autodose, but you should try the Aqualifter because it is pretty simple to set up.
08-15-2008 04:15 PM
Manolito I am using enteral pumps that I got really cheap from an auction. Now I am running 2 of them - one for the micro nutrients and the other for the macro.

I am using a gallon milk jugs and dripping at 5 ml/hr. A gallon will last for about a month.

08-15-2008 03:24 PM
OverStocked
Quote:
Originally Posted by m.lemay View Post
1 minute seems to be the minimum on time for most timers I've seen. My75 evaporates about 3 gallons a week which is more than enough to make up for the .22liters/min.

A solenoid valve would work but then theres the problem of hiding the drip container as it has to be above the water mark. A decent solenoid valve had to be at least $20 last time I checked.

I'm gonna do some experimenting with the pump. I might also be able to regulate the flow with an airline valve to fine tune it a little. I'll let you guys know how this all pans out. At $9.99, I figured I'd give it a shot. My daily coffee habit cost more than that.

Marcel
As a paramedic I have access to all of the iv stuff, so I defeated the part of having the bag above the tank by using a pressure infuser:

It takes more "finesse" to get the drip rate where you want it, but still works.
08-15-2008 02:11 PM
garuf Any chance of an update on this? It's something I would really like to try!
07-30-2006 03:24 PM
vidiots
Quote:
Originally Posted by m.lemay
Actually No, not really. Ideally the resevoir should be set next to or behind the tank because the flow rate drops off dramatically as it drops down. That's why I scrapped the idea ,because I didn't want to see the resevoir.
Maybe one of those hang on the back refugiums would work perfectly for this pump.
Sean, if you wanna borrow the pump to experiment with it, I can send it over to ya. I'm so swamped at work, that I don't have time to mess with it right now. Send me a PM.
Marcel
I am currently using this setup. I am using plastic 1 gallon milk jugs as my reservoirs. I drilled a hole in the cap to insert a piece of rigid air line tubing and a couple of tiny holes to allow air to enter as the liquid is pumped out. To the rigid airline tubing I have attached flexible airline tubing to the pumps input. I also used another short piece of airline tubing to connect to the pumps output and go thru a hole I drilled in my sump tanks lid.

My sump tank is a 20gallon high tank. The reservoir is sitting on the bottom of my 180gal display tank stand (so is the sump tank). The Aqua Lifter pumps is sitting on top of the sump tank's lid.

The pumps are plugged into a digital timer that can be set in 1min increments. I currently have the timer set to 2minutes per day.

From the floor of the stand to the pumps connector (the highest point) is 18".
At this height the pumps average flow rate is 90mL per minute. The flow rate is about 20% faster when the reservoir is full, and about 20% slower when the reservoir is near empty. At this flow rate I can mix about 15days worth of fertilizer with 3 Liters of water.

I used a measuring cup and a marker to mark my reservoir in 200mL increments. This makes calibrating and refilling it easier. I used a stop watch to measure the flow rate recording it as the fluid level passed each of my volume marks.

I'm done testing it with water, and have had it hooked up with actual fertilizer in the reservoir for just a few days. So far all is working well. However to play it safe I'm only putting 5 days worth of fertilizer in the reservoir at a time and checking it daily to monitor it. After I am satisfied with it's long term reliability, I'll add more fertilizer and check on it less often.

01-17-2006 09:57 PM
csf While I haven't tried it, i figure that model airplane fuel pumps could work very well for this set-up. While I don't know if they have some oils inside to help seal things up, they are fairly cheap. Look up hooby lobby on google. They were about $20 apiece.
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