how many auto doser do you need? - The Planted Tank Forum
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post #1 of 16 (permalink) Old 08-25-2012, 12:10 PM Thread Starter
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how many auto doser do you need?

I have 3 tanks, so I don't want to buy alot of auto dosers.

how many pumps do you need for 1 tank?
can you mix macro and micro in one pump?
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post #2 of 16 (permalink) Old 08-25-2012, 04:15 PM
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Do not mix macro and micro in one pump. The phosphate and iron will precipitate.

If you use Excel you might be able to put some in each bottle, macros and micros, so your tank will get some excel each day. I know some people use excel to minimize the growth of 'stuff' in the micros and macros bottles. I do not know if there is enough to count as dosing excel, though.
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post #3 of 16 (permalink) Old 08-25-2012, 05:02 PM
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If the tanks are the same volumes them all you need is 2. One macro, one micro to feed all 3 tanks at the same time but if they are all different the, I'd go with 6 pumps.


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post #4 of 16 (permalink) Old 08-26-2012, 01:45 AM Thread Starter
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This is what I don't understand, how do you use one pump for 3 tanks? There's only one tube that comes out of each pump.
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post #5 of 16 (permalink) Old 08-26-2012, 01:46 AM Thread Starter
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How much are these pumps anyway?
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post #6 of 16 (permalink) Old 08-26-2012, 07:08 AM
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Code:
           _____>
Pump______|____>
          |_____>

A peristaltic pump can cost $60 - $120


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post #7 of 16 (permalink) Old 08-26-2012, 07:45 AM
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Question

Quote:
Originally Posted by mistergreen View Post
Code:
           _____>
Pump______|____>
          |_____>

A peristaltic pump can cost $60 - $120
Wouldn't the liquid take the path of least resistance to the closest tank?
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post #8 of 16 (permalink) Old 08-26-2012, 11:50 AM Thread Starter
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exactly what i was thinking.
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post #9 of 16 (permalink) Old 08-26-2012, 12:39 PM
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Have you considered a pair of "Tom Aquatics Aqua-Lifter Dosing Pump ($14 each @ MD)" hooked to a one minute timer? Rated at .22 liters per minute, it should just be a matter of proper dilution. This could be much cheaper.

That AquaMedic dual pump doser looks nice, but I'm not spending $300 to dose one tank. May test this out myself in a month or two.

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post #10 of 16 (permalink) Old 08-26-2012, 02:15 PM Thread Starter
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i saw a review about the different output it dispenses based on the volume of the container.
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post #11 of 16 (permalink) Old 08-26-2012, 02:38 PM
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Quote:
Originally Posted by alphabeatsco View Post
i saw a review about the different output it dispenses based on the volume of the container.
Interesting. Maybe I'll just buy one to test with. If it swings too wildly I can just use it as an ATO unit.

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post #12 of 16 (permalink) Old 08-26-2012, 02:39 PM Thread Starter
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how can it be used as ATO?
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post #13 of 16 (permalink) Old 08-26-2012, 04:16 PM
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Quote:
Originally Posted by TheFoleys View Post
Wouldn't the liquid take the path of least resistance to the closest tank?
No, not really and some small in line air line valves can fix any differences.
Peristalic pumps should have constant pressure.

Why?

They have constant flow rate, say 1.1 mls per minute.
Small differences in head pressure should not CHANGE this flow rate.

Personally I'd opt for different pumps for each tank.

Why?

Well, each tank is different and having a mess of dosing lines running all over is a mess. If you want to connect things from the same system, go with a central filtration system, then CO2, dosing etc, heating is all the same place.

If not, then you end up with lines running all over or you have to have the tanks all on the same rack close together, so you cannot space them nicely around the home.




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post #14 of 16 (permalink) Old 08-26-2012, 04:17 PM
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Quote:
Originally Posted by alphabeatsco View Post
i saw a review about the different output it dispenses based on the volume of the container.
You can use this to check and then adjust the valves to back more into each container. With some tweaking, it can be done.




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post #15 of 16 (permalink) Old 08-26-2012, 04:19 PM
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Quote:
Originally Posted by alphabeatsco View Post
how can it be used as ATO?
Attach it to a bucket, set timer to run for however many minutes each day required to fill the tank.

EDIT:

.22l is about 15 tbs. If it's only off by a couple of tablespoons either way, I think it would be easy to adjust the mixture. I'm also wondering if the review you read the user was using a sealed bottle (like a DIY CO2 2 litre) or something. The increase in vacuum would make the pump's job increasingly difficult, and each subsequent dosing would be smaller.

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