Dosing pumps vs water pump - The Planted Tank Forum
 
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post #1 of 6 (permalink) Old 02-03-2015, 06:35 AM Thread Starter
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Dosing pumps vs water pump

I am trying to weigh the pros and cons to using a mini micro priming gear water pump vs peristaltic dosing pump. I only ask because there is a $9 price difference and I need a few.
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post #2 of 6 (permalink) Old 02-03-2015, 06:58 AM
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I'm not sure of the difference, although part of it is how they function. The rollers in the peristaltic pumps (read: the working bits of the pump) never actually come into contact with liquid.

Whether or not that's an issue I'm not sure. Bigger question is: How precise is the priming pump? You are basically shooting for under +/- 1ml precision in your dosage. The inexpensive peristaltic pumps from FleaBay have been solid in this regard, for me. (note each pump needs to be individually controlled and calibrated, as each works every so slightly differently... if you power each for the exact same amount of time, you can end up dosing slightly different amounts, if your pumps are far apart from each other. Depending on your application, this may or may not be an issue.)


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post #3 of 6 (permalink) Old 02-03-2015, 07:13 AM
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I am using 2x of the white one (cheaper than black one) for 4 months now, hooked up to an arduino via relay. One is dosing micro nutrients one is dosing macro nutrients, on different days. Works very well for me. I can precisely control how much it pumps as I am using a micro controller.

Something to keep in mind is that the input tube needs to be as short as possible, otherwise the pump will not be priming thus not ...pumping. Output tube can be over 1 meter.

No experience with the other pump in your OP.

Here's a schematic to better explain what I am trying to say here...



Quote:
Originally Posted by kman View Post
I'm not sure of the difference, although part of it is how they function. The rollers in the peristaltic pumps (read: the working bits of the pump) never actually come into contact with liquid.
The white version is using an impeller to push water, similar to our filters. The peristaltic pump (black) is pinching the tube to achieve the pumping effect.

Last edited by ichristos; 02-03-2015 at 07:15 AM. Reason: .
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post #4 of 6 (permalink) Old 02-03-2015, 07:40 AM
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As far as I know peristaltic pumps give a more precise control and this is the reason they are used in medical equipments where precise volume 8s required.
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post #5 of 6 (permalink) Old 02-03-2015, 07:53 AM
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How many in total do you need? It would be hard to go past the Jabeo like in my sig no?


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post #6 of 6 (permalink) Old 02-05-2015, 04:42 AM Thread Starter
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Thanks for the responses. I bought one of the white ones and I may give it a try to see how it preforms over time. Right now I have 3 tanks to dose...there will probably be more in the future. One of them I have made an controller with the peristaltic pumps which seems to be working quite well.
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